{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2021-20090",
        "assignerOrgId": "5ac1ecc2-367a-4d16-a0b2-35d495ddd0be",
        "assignerShortName": "tenable",
        "dateUpdated": "2025-10-21T23:25:47.628Z",
        "dateReserved": "2020-12-17T00:00:00.000Z",
        "datePublished": "2021-04-29T00:00:00.000Z"
    },
    "containers": {
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                "dateUpdated": "2023-10-18T11:29:20.400Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication."
                }
            ],
            "affected": [
                {
                    "vendor": "n/a",
                    "product": "Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3",
                    "versions": [
                        {
                            "version": "WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.tenable.com/security/research/tra-2021-13"
                },
                {
                    "name": "VU#914124",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.kb.cert.org/vuls/id/914124"
                },
                {
                    "url": "https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/"
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "text",
                            "lang": "en",
                            "description": "Path Traversal"
                        }
                    ]
                }
            ]
        },
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            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T17:30:07.572Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://www.tenable.com/security/research/tra-2021-13",
                        "tags": [
                            "x_transferred"
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                    },
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                        "url": "https://www.kb.cert.org/vuls/id/914124"
                    },
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                        "url": "https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/",
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                ]
            },
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.8,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2021-20090",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "active"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2025-02-06T20:25:22.891349Z"
                            }
                        }
                    },
                    {
                        "other": {
                            "type": "kev",
                            "content": {
                                "dateAdded": "2021-11-03",
                                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090"
                            }
                        }
                    }
                ],
                "references": [
                    {
                        "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090",
                        "tags": [
                            "government-resource"
                        ]
                    }
                ],
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "lang": "en",
                                "type": "CWE",
                                "cweId": "CWE-22",
                                "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
                            }
                        ]
                    }
                ],
                "timeline": [
                    {
                        "time": "2021-11-03T00:00:00.000Z",
                        "lang": "en",
                        "value": "CVE-2021-20090 added to CISA KEV"
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-10-21T23:25:47.628Z"
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    }
}