CVE-2026-45654

Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

Score

CVSS 3.1 7.9 High

Status

Modified - secure@microsoft.com

Published

2026-06-09

Last modified

2026-09-24

Weaknesses

CWE-284

Affected products

• Windows 11 24H2 (Microsoft)
• Windows 11 24h2 (Microsoft)
• Windows 11 25H2 (Microsoft)
• Windows 11 25h2 (Microsoft)
• Windows 11 26H1 (Microsoft)
• Windows 11 26h1 (Microsoft)
• Windows Server 2025 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654