{"id":"CVE-2026-55001","aliases":["EUVD-2026-44010","GHSA-2x53-82m9-jcgf"],"status":"published","title":"Active Directory Domain Services Elevation of Privilege Vulnerability","description":"Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00298,"percentile":0.22667,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-07-14T17:04:49Z","modified":"2026-11-10T22:35:24Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55001","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55001"},{"url":"https://github.com/advisories/GHSA-2x53-82m9-jcgf"}],"sources":{"cve":[{"id":"CVE-2026-55001","title":"Active Directory Domain Services Elevation of Privilege Vulnerability","description":"Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:04:49.22Z","modified":"2026-11-10T22:35:24.991Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-10T23:49:29.024872Z"}],"euvd":[{"id":"EUVD-2026-44010","description":"Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:04:49Z","modified":"2026-11-10T22:35:24Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:15.503335Z"}],"ghsa":[{"id":"GHSA-2x53-82m9-jcgf","title":"Improper certificate validation in Windows Active Directory allows an authorized attacker to...","description":"Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T18:32:09Z","modified":"2026-07-14T18:32:16Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:09:28.885137Z"}],"nvd":[{"id":"CVE-2026-55001","description":"Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:17:07.943Z","modified":"2026-07-24T14:18:05.577Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}