{"cve_id":"CVE-2021-20090","published":"2021-04-29T15:15:10.630000+00:00","last_modified":"2026-06-17T03:33:15.487000+00:00","vuln_status":"Analyzed","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.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-22"],"in_kev":true,"kev_date_added":"2021-11-03","kev_ransomware":false,"epss_score":0.99982,"epss_percentile":0.99982,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC","INFO_DISCLOSURE"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:41:33.892865+00:00","first_seen":"2021-04-29T15:15:10.630000+00:00","kev_first_seen":"2021-11-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["buffalo"],"products":["wsr-2533dhp3-bk","wsr-2533dhp3-bk_firmware","wsr-2533dhpl2-bk","wsr-2533dhpl2-bk_firmware"],"affected":[{"vendor":"buffalo","product":"wsr-2533dhp3-bk_firmware","ranges":["≤ 1.24"]},{"vendor":"buffalo","product":"wsr-2533dhpl2-bk_firmware","ranges":["≤ 1.02"]}]}