What is CVE-2026-45654?

CVE-2026-45654 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Secure Boot Security Feature Bypass Vulnerability

Which CVE IDs does CVE-2026-45654 cover?

CVE-2026-45654 covers the following CVE IDs: CVE-2026-45654. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-45654?

CVE-2026-45654 has a CVSS v3 base score of 7.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-45654?

CVE-2026-45654 affects 8 products, including: Windows 11 Version 24H2 for ARM64-based Systems; Windows 11 Version 24H2 for x64-based Systems; Windows 11 Version 25H2 for ARM64-based Systems; Windows 11 Version 25H2 for x64-based Systems; Windows 11 Version 26H1 for ARM64-based Systems; and others — see the full list on the advisory page.

CVE-2026-45654HighCVSS 7.9

Secure Boot Security Feature Bypass Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 10, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-45654 →

📋 Description

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

🎯 Affected products8

Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5095051 (Security Update) — fixed build 10.0.28000.2269 KB5094125 (Security Update) — fixed build 10.0.26100.32995 KB5094126 (Security Update) — fixed build 10.0.26200.8655 KB5094126 (Security Update) — fixed build 10.0.26100.8655

🔗 References (7)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5095051
referencehttps://support.microsoft.com/help/5095051
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5094125
referencehttps://support.microsoft.com/help/5094125
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5094126
referencehttps://support.microsoft.com/help/5094126