{"id":"CVE-2026-33840","aliases":["EUVD-2026-29586","GHSA-5crp-h3g2-hwww"],"status":"published","title":"Win32k Elevation of Privilege Vulnerability","description":"Use after free in Windows Win32K - ICOMP 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":"2026-11-11","score":0.02014,"percentile":0.81151,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-05-12T16:58:19Z","modified":"2026-08-10T15:14:01Z","products":[{"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 server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33840","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33840"},{"url":"https://github.com/advisories/GHSA-5crp-h3g2-hwww"}],"sources":{"cve":[{"id":"CVE-2026-33840","title":"Win32k Elevation of Privilege Vulnerability","description":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:58:19.989Z","modified":"2026-08-10T15:14:01.734Z","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-416"],"updated_at":"2026-11-02T14:20:07.609948Z"}],"euvd":[{"id":"EUVD-2026-29586","description":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:58:19Z","modified":"2026-08-10T15:14:01Z","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":"2026-11-02T18:02:01.941928Z"}],"ghsa":[{"id":"GHSA-5crp-h3g2-hwww","title":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges...","description":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:30:42Z","modified":"2026-05-12T18:30:49Z","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-416"],"updated_at":"2026-11-02T15:08:04.998143Z"}],"nvd":[{"id":"CVE-2026-33840","description":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:17:06.163Z","modified":"2026-06-17T10:38:11.373Z","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-416"],"updated_at":"2026-11-02T14:12:18.613259Z"}]}}