{"id":"CVE-2021-20090","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-20090","summary":"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…","details":"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.","published":"2021-04-29T15:15:10.630","modified":"2026-06-17T03:33:15.487","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.99983,"percentile":0.99981,"asOf":"2026-09-05"},"cisaKev":null,"exploitsKnown":4,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.kb.cert.org/vuls/id/914124"},{"type":"EXPLOIT","url":"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/"},{"type":"EXPLOIT","url":"https://www.tenable.com/security/research/tra-2021-13"},{"type":"ADVISORY","url":"https://www.kb.cert.org/vuls/id/914124"},{"type":"EXPLOIT","url":"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/"},{"type":"EXPLOIT","url":"https://www.tenable.com/security/research/tra-2021-13"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-06-17T03:33:15.487"}}