{"id":"CVE-2021-20090","state":"PUBLISHED","title":"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 ","description":"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.","publishedAt":"2021-04-29T00:00:00.000Z","updatedAt":"2025-10-21T23:25:47.628Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"tenable","products":["n/a Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3"],"affected":[{"vendor":"n/a","product":"Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3","versions":[{"version":"WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24","status":"affected"}]}],"references":["https://www.tenable.com/security/research/tra-2021-13","https://www.kb.cert.org/vuls/id/914124","https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T19:47:55.610Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/20xxx/CVE-2021-20090.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-20090","state":"PUBLISHED","datePublished":"2021-04-29T00:00:00.000Z","dateUpdated":"2025-10-21T23:25:47.628Z","assignerShortName":"tenable","assignerOrgId":"5ac1ecc2-367a-4d16-a0b2-35d495ddd0be","dateReserved":"2020-12-17T00:00:00.000Z"},"containers":{"cna":{"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"},{"url":"https://www.kb.cert.org/vuls/id/914124","name":"VU#914124","tags":["third-party-advisory"]},{"url":"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/"}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"Path Traversal"}]}],"providerMetadata":{"shortName":"tenable","orgId":"5ac1ecc2-367a-4d16-a0b2-35d495ddd0be","dateUpdated":"2023-10-18T11:29:20.400Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.tenable.com/security/research/tra-2021-13","tags":["x_transferred"]},{"url":"https://www.kb.cert.org/vuls/id/914124","name":"VU#914124","tags":["third-party-advisory","x_transferred"]},{"url":"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T17:30:07.572Z"}},{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090","tags":["government-resource"]}],"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"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","type":"CWE","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-21T23:25:47.628Z"},"timeline":[{"time":"2021-11-03T00:00:00.000Z","lang":"en","value":"CVE-2021-20090 added to CISA KEV"}]}]}}}