{"id":"CVE-2026-105009","aliases":["EUVD-2026-100398","GHSA-455h-gjpq-v2gc"],"status":"published","title":"Windows Server Update Service Elevation of Privilege Vulnerability","description":"Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0032,"percentile":0.25326,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-276"],"published":"2026-10-13T19:01:37Z","modified":"2026-11-10T20:46:37Z","products":[{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"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_server_2012"},{"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-2026-105009","tags":["vendor-advisory","patch","Vendor Advisory","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105009"},{"url":"https://github.com/advisories/GHSA-455h-gjpq-v2gc"}],"sources":{"cve":[{"id":"CVE-2026-105009","title":"Windows Server Update Service Elevation of Privilege Vulnerability","description":"Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:01:37.135Z","modified":"2026-11-10T20:46:37.607Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-276"],"updated_at":"2026-11-10T22:18:24.949973Z"}],"euvd":[{"id":"EUVD-2026-100398","description":"Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:01:37Z","modified":"2026-11-10T20:46:37Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:55.776344Z"}],"ghsa":[{"id":"GHSA-455h-gjpq-v2gc","title":"Incorrect default permissions in Windows Server Update Service allows an authorized attacker to...","description":"Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T21:33:10Z","modified":"2026-10-13T21:33:11Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T15:13:13.272556Z"}],"nvd":[{"id":"CVE-2026-105009","description":"Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:17:57.277Z","modified":"2026-10-26T15:29:00.777Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:12:57.132005Z"}]}}