{"id":"CVE-2026-26166","title":"Windows Shell Elevation of Privilege Vulnerability","summary":"Double free in Windows Shell allows an authorized attacker to elevate privileges locally.","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-415"],"vendor":"Microsoft","product":"Windows 11 version 22H3","affected":["windows_11_version_22h3 >= 10.0.22631.0 < 10.0.22631.6936","windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.6936","windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8246","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8246","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.1836","windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5020","windows_server_2022_23h2_edition_server_core_installation >= 10.0.25398.0 < 10.0.25398.2274","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32690","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32690"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-04-09T00:00:00+00:00"},"published":"2026-04-14","updated":"2026-09-25","sourceUpdated":"2026-09-25T17:24:59.110Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-26166","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26166","label":"Windows Shell Elevation of Privilege Vulnerability"}],"tags":["cve.org"],"epss":0.00264,"epssPercentile":0.16302,"ingestedAt":"2026-09-25T18:14:20.458Z","slug":"CVE-2026-26166","body":"## Overview\n\nDouble free in Windows Shell allows an authorized attacker to elevate privileges locally.\n\n## Affected\n\n- `windows_11_version_22h3 >= 10.0.22631.0 < 10.0.22631.6936`\n- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.6936`\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8246`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8246`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.1836`\n- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5020`\n- `windows_server_2022_23h2_edition_server_core_installation >= 10.0.25398.0 < 10.0.25398.2274`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32690`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32690`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}