{"id":"CVE-2026-20920","title":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.","summary":"Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"microsoft","product":"windows_11_23h2","affected":["windows_11_23h2 < 10.0.22631.6491","windows_server_2022 < 10.0.20348.4648","windows_server_2022_23h2 < 10.0.25398.2092"],"patched":["windows_11_23h2 10.0.22631.6491","windows_server_2022 10.0.20348.4648","windows_server_2022_23h2 10.0.25398.2092"],"published":"2026-01-13","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-20920","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20920","label":"secure@microsoft.com"}],"tags":["nvd"],"epss":0.005,"epssPercentile":0.41877,"ingestedAt":"2026-07-31T06:58:53.083Z","slug":"CVE-2026-20920","body":"## Overview\n\nUse after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.\n\n## Affected\n\n- `windows_11_23h2 < 10.0.22631.6491`\n- `windows_server_2022 < 10.0.20348.4648`\n- `windows_server_2022_23h2 < 10.0.25398.2092`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_11_23h2 10.0.22631.6491`\n- `windows_server_2022 10.0.20348.4648`\n- `windows_server_2022_23h2 10.0.25398.2092`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}