CVE-2026-42829

Windows Administrator Protection Secure Feature Bypass Vulnerability

CVE-2026-42829 is fixed in 6 products on 1 platform, first by KB5094126, released June 9, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0029

21st percentile

<p>Improper access control in Windows Administrator Protection allows an authorized attacker to bypass a security feature locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 24H2 for ARM64-based Systems		KB5094126	Jun 9, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5094126	Jun 9, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5094126	Jun 9, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5094126	Jun 9, 2026
Windows 11 Version 26H1 for ARM64-based Systems	28000.2269	KB5095051	Jun 9, 2026
Windows 11 version 26H1 for x64-based Systems	28000.2269	KB5095051	Jun 9, 2026

Details

Published
June 9, 2026
Weakness
Improper Access Control
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42829

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