CVE-2026-45654

Published: Jun 9, 2026Modified: Jun 11, 2026

7.9

Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Exploitability: 1.5 / Impact: 5.8

Source: secure@microsoft.com

Description

Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

Affected (7)

Products: Microsoft: Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2025

4 products

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2025

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 24h2	Before 10.0.26100.8655
Microsoft Windows 11 24h2	Before 10.0.26100.8655
Microsoft Windows 11 25h2	Before 10.0.26200.8655
Microsoft Windows 11 25h2	Before 10.0.26200.8655
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows Server 2025	Before 10.0.26100.32995

Related CWEs

Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

References (1)

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

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.