CVE-2026-42829: Windows Administrator Protection Secure Feature Bypass Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Security Feature Bypass

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Jun

Released

2026-06-09

EPSS Score

0.29% (percentile: 21.2%)

Description

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

FAQ

What kind of security feature could be bypassed by successfully exploiting this vulnerability? This vulnerability could bypass Windows Administrator Protection, a security feature designed to prevent applications running with standard user permissions from performing actions that require administrator access. Successful exploitation could allow an attacker to run code with administrator privileges without the normal security checks.

Affected Products (6)

Windows

• Windows 11 Version 25H2 for ARM64-based Systems
• Windows 11 Version 25H2 for x64-based Systems
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows 11 version 26H1 for x64-based Systems
• Windows 11 Version 26H1 for ARM64-based Systems

Security Updates (2)

• 5094126
• 5095051

Acknowledgments

Antonio Cocomazzi with <a href="https://www.sentinelone.com/">SentinelOne</a>, Simone Nicchi with <a href="https://www.sentinelone.com/">SentinelOne</a>

Revision History

• 2026-06-09: Information published.