Windows Boot Loader Security Feature Bypass VulnerabilityVendor advisorypatch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58638 CVE-2026-58638
MEDIUM
Windows Boot Loader Security Feature Bypass Vulnerability
Record summary
CVE-2026-58638 has a selected CVSS score of 6.0 (medium).
Description
Missing cryptographic step in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
Description source: GitHub Advisory
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Jul 15, 2026 · Source: CVE List
Affected products and versions
Showing 12 of 17| Product | Source | Version range | Status |
|---|---|---|---|
Windows 10 Version 1809Browse Microsoft / Windows 10 Version 1809 | CVE List | 10.0.17763.0 to < 10.0.17763.9020 | affected |
Windows 10 Version 21H2Browse Microsoft / Windows 10 Version 21H2 | CVE List | 10.0.19044.0 to < 10.0.19044.7548 | affected |
Windows 10 Version 22H2Browse Microsoft / Windows 10 Version 22H2 | CVE List | 10.0.19045.0 to < 10.0.19045.7548 | affected |
Windows 11 Version 24H2Browse Microsoft / Windows 11 Version 24H2 | CVE List | 10.0.26100.0 to < 10.0.26100.8875 | affected |
Windows 11 Version 25H2Browse Microsoft / Windows 11 Version 25H2 | CVE List | 10.0.26200.0 to < 10.0.26200.8875 | affected |
Windows 11 version 26H1Browse Microsoft / Windows 11 version 26H1 | CVE List | 10.0.28000.0 to < 10.0.28000.2525 | affected |
Windows Server 2012Browse Microsoft / Windows Server 2012 | CVE List | 6.2.9200.0 to < 6.2.9200.26226 | affected |
Windows Server 2012 (Server Core installation)Browse Microsoft / Windows Server 2012 (Server Core installation) | CVE List | 6.2.9200.0 to < 6.2.9200.26226 | affected |
Windows Server 2012 R2Browse Microsoft / Windows Server 2012 R2 | CVE List | 6.3.9600.0 to < 6.3.9600.23291 | affected |
Windows Server 2012 R2 (Server Core installation)Browse Microsoft / Windows Server 2012 R2 (Server Core installation) | CVE List | 6.3.9600.0 to < 6.3.9600.23291 | affected |
Windows Server 2016Browse Microsoft / Windows Server 2016 | CVE List | 10.0.14393.0 to < 10.0.14393.9339 | affected |
Windows Server 2016 (Server Core installation)Browse Microsoft / Windows Server 2016 (Server Core installation) | CVE List | 10.0.14393.0 to < 10.0.14393.9339 | affected |
References
2nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-58638