CVE-2025-27475: Windows Update Stack Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Apr

Released

2025-04-08

EPSS Score

0.17% (percentile: 37.8%)

Description

Sensitive data storage in improperly locked memory in Windows Update Stack allows an authorized attacker to elevate privileges locally.

FAQ

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition. What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Affected Products (6)

ESU

• Windows 11 Version 22H2 for ARM64-based Systems
• Windows 11 Version 22H2 for x64-based Systems

Windows

• Windows 11 Version 23H2 for ARM64-based Systems
• Windows 11 Version 23H2 for x64-based Systems
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems

Security Updates (2)

• 5055528
• 5055523

Acknowledgments

<a href="https://linkedin.com/in/jongseongkim">Jongseong Kim (nevul37)</a> with <a href="https://www.enki.co.kr/">Ajou University, and working at ENKI WhiteHat</a>

Revision History

• 2025-04-08: Information published.