{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-20127",
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "state": "PUBLISHED",
        "assignerShortName": "cisco",
        "dateReserved": "2025-10-08T11:59:15.379Z",
        "datePublished": "2026-02-25T16:14:20.137Z",
        "dateUpdated": "2026-06-16T17:57:59.054Z"
    },
    "containers": {
        "cna": {
            "title": "Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability",
            "metrics": [
                {
                    "format": "cvssV3_1",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                        "baseScore": 10,
                        "baseSeverity": "CRITICAL",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH"
                    }
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.\r\n\r\nThis vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric. "
                }
            ],
            "references": [
                {
                    "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk",
                    "name": "cisco-sa-sdwan-rpa-EHchtZk"
                }
            ],
            "exploits": [
                {
                    "lang": "en",
                    "value": "The Cisco PSIRT is aware of limited exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability."
                }
            ],
            "source": {
                "advisory": "cisco-sa-sdwan-rpa-EHchtZk",
                "discovery": "INTERNAL",
                "defects": [
                    "CSCws52722"
                ]
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improper Authentication",
                            "type": "cwe",
                            "cweId": "CWE-287"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Cisco",
                    "product": "Cisco Catalyst SD-WAN Manager",
                    "versions": [
                        {
                            "version": "20.1.12",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.4",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.1.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "19.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.099",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.6",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.7",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.8",
                            "status": "affected"
                        },
                        {
                            "version": "19.0.0",
                            "status": "affected"
                        },
                        {
                            "version": "19.1.0",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.302",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.303",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.097",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.098",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.10",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.6.1",
                            "status": "affected"
                        },
                        {
                            "version": "19.0.1a",
                            "status": "affected"
                        },
                        {
                            "version": "18.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.3",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.8",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.6",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.9",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.4",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.5",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.5",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.3",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.7",
                            "status": "affected"
                        },
                        {
                            "version": "17.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "18.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.501_ES",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.929",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.31",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.32",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2_925",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2.1_927",
                            "status": "affected"
                        },
                        {
                            "version": "18.4.6",
                            "status": "affected"
                        },
                        {
                            "version": "20.1.2_937",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2_928",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2_929",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2.1_930",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.5.0.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.4.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2_937",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.5.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.1.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1.1.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1.0.01",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.1.0.02",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.1.7",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.1.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.5.1.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.1.10",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.8",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.14",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.4.0.8",
                            "status": "affected"
                        },
                        {
                            "version": "19.2.4.0.9",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2.0.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.5.1.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.17",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.0.18.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.2.0.6",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.0.18.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.16",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.1.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.6",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.7.1EFT2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.9",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.11",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.0.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.0.18",
                            "status": "affected"
                        },
                        {
                            "version": "20.7.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.5.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.813",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.19",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.5.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.814",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.7.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.20",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.0.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.24",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.2.7",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.7.1.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.8.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.5.0.8",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.5.0.9",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.2.8",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.5.0.7",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.7",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.10",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.7.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.1EFT2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.11",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.14",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.19",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.18",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.6",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.23",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.4.0.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.25",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.27",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.29",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.31",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.32",
                            "status": "affected"
                        },
                        {
                            "version": "20.10.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.33",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.2.0.01",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.1_LI_Images",
                            "status": "affected"
                        },
                        {
                            "version": "20.10.1_LI_Images",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.2_LI_Images",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.7",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.11.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.11.1_LI_Images",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.3_LI_ Images",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.3.0.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.3.0.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.4.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.38",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.39",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.5.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.3.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.7.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.10.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.25",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.2.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.11.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.3.0.5",
                            "status": "affected"
                        },
                        {
                            "version": "20.3.4.0.26",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.1.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.3.0.40",
                            "status": "affected"
                        },
                        {
                            "version": "20.1.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "20.9.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "20.6.5.1.4",
                            "status": "affected"
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