CVE-2025-55677: Windows Device Association Broker Service Elevation of Privilege 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

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Unlikely

Patch Tuesday

2025-Oct

Released

2025-10-14

EPSS Score

0.06% (percentile: 17.9%)

Description

Untrusted pointer dereference in Windows Device Association Broker service allows an authorized attacker to elevate privileges locally.

FAQ

What privileges could be gained by an attacker who successfully exploited the vulnerability? An attacker could use this vulnerability to elevate privileges from Medium Integrity Level to Local Service.

Affected Products (6)

Windows

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

Security Updates (1)

• 5066835

Acknowledgments

Hwiwon Lee (hwiwonl), SEC-agent team, <a href="https://linkedin.com/in/jongseongkim">Jongseong Kim (nevul37), SEC-agent team</a> with <a href="https://www.enki.co.kr/">ENKI WhiteHat</a>

Revision History

• 2025-10-14: Information published.