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

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)

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.