CVE-2021-20090

{"id": "CVE-2021-20090", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"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"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"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"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-04-29T15:15:10.630", "references": [{"url": "https://www.kb.cert.org/vuls/id/914124", "tags": ["Third Party Advisory", "US Government Resource"], "source": "vulnreport@tenable.com"}, {"url": "https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/", "tags": ["Exploit", "Third Party Advisory"], "source": "vulnreport@tenable.com"}, {"url": "https://www.tenable.com/security/research/tra-2021-13", "tags": ["Exploit", "Third Party Advisory"], "source": "vulnreport@tenable.com"}, {"url": "https://www.kb.cert.org/vuls/id/914124", "tags": ["Third Party Advisory", "US Government Resource"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.tenable.com/security/research/tra-2021-13", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-22"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-22"}]}], "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."}, {"lang": "es", "value": "Una vulnerabilidad de salto de ruta en las interfaces web de Buffalo WSR-2533DHPL2 versi\u00f3n de firmware anterior a 1.02 e incluy\u00e9ndola y WSR-2533DHP3 versi\u00f3n de firmware anterior a 1.24 e incluy\u00e9ndola, podr\u00eda permitir a atacantes remotos no autenticados omitir la autenticaci\u00f3n"}], "lastModified": "2025-11-03T18:59:30.060", "cisaActionDue": "2021-11-17", "cisaExploitAdd": "2021-11-03", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:buffalo:wsr-2533dhpl2-bk_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D861729C-023B-4D73-8C4C-BF7E8B0B7045", "versionEndIncluding": "1.02"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:buffalo:wsr-2533dhpl2-bk:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1B03FA14-33E3-44D2-8165-197CB446F2D2"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:buffalo:wsr-2533dhp3-bk_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "63232EC8-B2B8-4867-93DB-C0C5147E2730", "versionEndIncluding": "1.24"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:buffalo:wsr-2533dhp3-bk:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7AA91D93-E2B9-4415-B541-1968F1F39814"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "vulnreport@tenable.com", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "Arcadyan Buffalo Firmware Path Traversal Vulnerability"}