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HIGH · 7.9

CVE-2026-45654

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

Vulnerability Description

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

CVSS Score

7.9

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftWindows 11 24H2< 10.0.26100.8655
MicrosoftWindows 11 25H2< 10.0.26200.8655
MicrosoftWindows 11 26H1< 10.0.28000.2269
MicrosoftWindows Server 2025< 10.0.26100.32995

Related Weaknesses (CWE)

CWE-284

References

FAQ

What is CVE-2026-45654?

CVE-2026-45654 is a vulnerability with a CVSS score of 7.9 (HIGH). Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

How severe is CVE-2026-45654?

CVE-2026-45654 has been rated HIGH with a CVSS base score of 7.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-45654?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 24H2, Microsoft Windows 11 25H2, Microsoft Windows 11 26H1, Microsoft Windows Server 2025.