{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-45654: Secure Boot Security Feature Bypass Vulnerability","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-45654","status":"final","version":"1","initial_release_date":"2026-06-09T17:05:43.972Z","current_release_date":"2026-06-10T17:54:33.849Z","revision_history":[{"date":"2026-06-09T17:05:43.972Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-45654 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-45654"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-45654"},{"category":"external","summary":"Secure Boot Security Feature Bypass Vulnerability","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654"}]},"product_tree":{"branches":[{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Windows 11 Version 24H2","branches":[{"category":"product_version_range","name":">=10.0.26100.0 <10.0.26100.8655","product":{"name":"Microsoft Windows 11 Version 24H2 >=10.0.26100.0 <10.0.26100.8655","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:windows_11_version_24h2:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Windows 11 Version 25H2","branches":[{"category":"product_version_range","name":">=10.0.26200.0 <10.0.26200.8655","product":{"name":"Microsoft Windows 11 Version 25H2 >=10.0.26200.0 <10.0.26200.8655","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:windows_11_version_25h2:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Windows 11 version 26H1","branches":[{"category":"product_version_range","name":">=10.0.28000.0 <10.0.28000.2269","product":{"name":"Microsoft Windows 11 version 26H1 >=10.0.28000.0 <10.0.28000.2269","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:windows_11_version_26h1:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Windows 11 Version 26H1","branches":[{"category":"product_version_range","name":">=1.0.0 <10.0.28000.2269","product":{"name":"Microsoft Windows 11 Version 26H1 >=1.0.0 <10.0.28000.2269","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:windows_11_version_26h1:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Windows Server 2025","branches":[{"category":"product_version_range","name":">=10.0.26100.0 <10.0.26100.32995","product":{"name":"Microsoft Windows Server 2025 >=10.0.26100.0 <10.0.26100.32995","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:windows_server_2025:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Windows Server 2025 (Server Core installation)","branches":[{"category":"product_version_range","name":">=10.0.26100.0 <10.0.26100.32995","product":{"name":"Microsoft Windows Server 2025 (Server Core installation) >=10.0.26100.0 <10.0.26100.32995","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:windows_server_2025_\\(server_core_installation\\):*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-45654","title":"Secure Boot Security Feature Bypass Vulnerability","notes":[{"category":"description","text":"Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"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","baseScore":7.9,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 10.0.26100.8655, 10.0.26100.32995, 10.0.26200.8655, 10.0.28000.2269.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654"}]}]}