{"id":"CVE-2026-45654","title":"Secure Boot Security Feature Bypass Vulnerability","summary":"Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","severity":"high","cvss":7.9,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-284"],"vendor":"Microsoft","product":"Windows 11 Version 24H2","affected":["windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8655","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8655","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2269","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32995","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32995"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-10T03:55:26.597262Z"},"published":"2026-06-09","updated":"2026-09-24","sourceUpdated":"2026-09-24T13:44:35.848Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45654","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654","label":"Secure Boot Security Feature Bypass Vulnerability"}],"tags":["cve.org"],"epss":0.00309,"epssPercentile":0.23889,"ingestedAt":"2026-09-24T14:44:21.390Z","slug":"CVE-2026-45654","body":"## Overview\n\nImproper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.\n\n## Affected\n\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8655`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8655`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2269`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32995`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32995`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":44,"depthScoreParts":{"impact":43.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}