{"id":"CVE-2026-119398","aliases":["EUVD-2026-122330","GHSA-rr28-c2c9-grc3"],"status":"published","title":"Windows Installer Elevation of Privilege Vulnerability","description":"Time-of-check time-of-use (toctou) race condition in Windows Installer 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":"2026-11-14","score":0.00331,"percentile":0.26603,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2026-11-10T18:22:33Z","modified":"2026-11-12T15:47:36Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows 11 version 26h2"},{"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)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119398","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119398"},{"url":"https://github.com/advisories/GHSA-rr28-c2c9-grc3"}],"sources":{"cve":[{"id":"CVE-2026-119398","title":"Windows Installer Elevation of Privilege Vulnerability","description":"Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:22:33.537Z","modified":"2026-11-13T18:11:18.767Z","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-367"],"updated_at":"2026-11-12T16:44:55.507368Z"}],"euvd":[{"id":"EUVD-2026-122330","description":"Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:22:33Z","modified":"2026-11-13T18:11:18Z","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":"2026-11-12T17:34:16.214781Z"}],"ghsa":[{"id":"GHSA-rr28-c2c9-grc3","title":"Improper access control in Windows Installer allows an authorized attacker to elevate privileges...","description":"Improper access control in Windows Installer allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T21:33:16Z","modified":"2026-11-10T21:33:25Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-367"],"updated_at":"2026-11-10T21:57:53.692707Z"}],"nvd":[{"id":"CVE-2026-119398","description":"Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T19:19:54.8Z","modified":"2026-11-12T16:18:31.437Z","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":"primary"}],"cwes":["CWE-367"],"updated_at":"2026-11-12T17:31:54.607345Z"}]}}