{"cve_id":"CVE-2021-43226","published":"2021-12-15T15:15:09.737000+00:00","last_modified":"2026-08-22T04:16:54.773000+00:00","vuln_status":"Analyzed","description":"Windows Common Log File System Driver Elevation of Privilege Vulnerability","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","base_score":7.8,"base_severity":"HIGH","attack_vector":"LOCAL","privileges_req":"LOW","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":[],"in_kev":true,"kev_date_added":"2025-10-06","kev_ransomware":true,"epss_score":0.03275,"epss_percentile":0.88422,"cap_rule_version":"0.1.1","stage":"EXECUTION","req_access":"USER","req_vector":"LOCAL","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"medium","ingested_at":"2026-09-18T09:53:54.929472+00:00","first_seen":"2021-12-15T15:15:09.737000+00:00","kev_first_seen":"2025-10-06T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["microsoft"],"products":["windows_10_1507","windows_10_1607","windows_10_1809","windows_10_1909","windows_10_2004","windows_10_20h2","windows_10_21h1","windows_10_21h2","windows_11_21h2","windows_7","windows_8.1","windows_rt_8.1","windows_server_2004","windows_server_2008","windows_server_2012","windows_server_2016","windows_server_2019","windows_server_2022","windows_server_20h2"],"affected":[{"vendor":"microsoft","product":"windows_10_1507","ranges":["< 10.0.10240.19145"]},{"vendor":"microsoft","product":"windows_10_1607","ranges":["< 10.0.14393.4825"]},{"vendor":"microsoft","product":"windows_10_1809","ranges":["< 10.0.17763.2366"]},{"vendor":"microsoft","product":"windows_10_1909","ranges":["< 10.0.18363.1977"]},{"vendor":"microsoft","product":"windows_10_2004","ranges":["< 10.0.19041.1415"]},{"vendor":"microsoft","product":"windows_10_20h2","ranges":["< 10.0.19042.1415"]},{"vendor":"microsoft","product":"windows_10_21h1","ranges":["< 10.0.19043.1415"]},{"vendor":"microsoft","product":"windows_10_21h2","ranges":["< 10.0.19044.1415"]},{"vendor":"microsoft","product":"windows_11_21h2","ranges":["< 10.0.22000.376"]},{"vendor":"microsoft","product":"windows_7","ranges":["all versions"]},{"vendor":"microsoft","product":"windows_8.1","ranges":["all versions"]},{"vendor":"microsoft","product":"windows_rt_8.1","ranges":["all versions"]},{"vendor":"microsoft","product":"windows_server_2004","ranges":["< 10.0.19041.1415"]},{"vendor":"microsoft","product":"windows_server_2008","ranges":["all versions","r2"]},{"vendor":"microsoft","product":"windows_server_2012","ranges":["all versions","r2"]},{"vendor":"microsoft","product":"windows_server_2016","ranges":["< 10.0.14393.4825"]},{"vendor":"microsoft","product":"windows_server_2019","ranges":["< 10.0.17763.2366"]},{"vendor":"microsoft","product":"windows_server_2022","ranges":["< 10.0.20348.405"]},{"vendor":"microsoft","product":"windows_server_20h2","ranges":["< 10.0.19042.1415"]}]}