{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-20173",
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "state": "PUBLISHED",
        "assignerShortName": "cisco",
        "dateReserved": "2025-10-08T11:59:15.392Z",
        "datePublished": "2026-10-07T16:12:04.505Z",
        "dateUpdated": "2026-10-07T17:42:39.672Z"
    },
    "containers": {
        "cna": {
            "title": "Cisco NX-OS Software Denial of Service 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:N/I:N/A:L",
                        "baseScore": 5.8,
                        "baseSeverity": "MEDIUM",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "LOW"
                    }
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A vulnerability in Cisco NX-OS Software could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition.\r\n\r\nThis vulnerability exists because rate limiting was improperly applied to some protocols. An attacker could exploit this vulnerability by sending a high rate of UDP or TCP connections to a data plane interface on an affected device. A successful exploit could allow the attacker to cause instability to various routing and control plane protocols through some packet loss and temporary disruptions, causing a DoS condition. This DoS condition will clear without manual intervention soon after the high rate of traffic is stopped."
                }
            ],
            "references": [
                {
                    "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7",
                    "name": "cisco-sa-nxos-nscpdos-SnderkC7"
                }
            ],
            "exploits": [
                {
                    "lang": "en",
                    "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
                }
            ],
            "source": {
                "advisory": "cisco-sa-nxos-nscpdos-SnderkC7",
                "discovery": "EXTERNAL",
                "defects": [
                    "CSCws28832"
                ]
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Allocation of Resources Without Limits or Throttling",
                            "type": "cwe",
                            "cweId": "CWE-770"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Cisco",
                    "product": "Cisco NX-OS Software",
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "version": "7.3(4)D1(1)",
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                        {
                            "version": "9.2(1)",
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                        },
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                            "version": "9.2(2t)",
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                        },
                        {
                            "version": "9.2(3y)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(2)",
                            "status": "affected"
                        },
                        {
                            "version": "8.1(1)",
                            "status": "affected"
                        },
                        {
                            "version": "8.2(2)",
                            "status": "affected"
                        },
                        {
                            "version": "8.3(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.3(2)D1(3a)",
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                        },
                        {
                            "version": "9.2(4)",
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                        },
                        {
                            "version": "8.1(2)",
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                        {
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                        {
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                            "version": "9.3(9)",
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                            "version": "7.3(9)D1(1)",
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                            "version": "8.4(6)",
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                            "version": "9.3(10)",
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                            "version": "8.2(9)",
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                        },
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                            "version": "8.4(6a)",
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                        },
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                            "status": "affected"
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                            "version": "10.3(3q)",
                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                "dateUpdated": "2026-10-07T16:12:04.505Z"
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        "adp": [
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                "metrics": [
                    {
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-07T17:42:18.044011Z",
                                "id": "CVE-2026-20173",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                        "Automatable": "yes"
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}