CVE-2026-50351: Windows Audio Compression Manager (ACM) 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
More Likely
Patch Tuesday
2026-Jul
Released
2026-07-14

Description

Improper access control in Windows Audio Compression Manager (ACM) allows an authorized attacker to elevate privileges locally.

Affected Products (27)

Windows

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows Server 2025 (Server Core installation)
  • 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 Server 2025
  • Windows 11 version 26H1 for x64-based Systems
  • Windows 11 Version 26H1 for ARM64-based Systems
  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)

ESU

  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)

Security Updates (10)

Acknowledgments

<a href="https://xbreach.ai/">XBreach.ai</a>, <a href="https://www.linkedin.com/in/yehuda-smirnov/">Yehuda Smirnov</a> with Microsoft, <a href="https://www.linkedin.com/in/naor-evgi/">Naor Evgi</a> with White-Hat LTD, <a href="https://www.twitter.com/crowdstrike">CrowdStrike Advanced Research Team</a> with <a href="https://www.crowdstrike.com/">CrowdStrike</a>, Mateusz Garncarek with <a href="https://digital-missiles.com/">Digital-Missiles</a>, <a href="https://www.linkedin.com/in/ali-shihab-952228318/">Ali Toni</a> with <a href="https://www.esraa.edu.iq/">Al-Esraa University</a>, pwn2addr, <a href="https://www.linkedin.com/in/andreabocchetti/">Andrea Bocchetti</a>, <a href="https://ch.linkedin.com/in/lydericlefebvre">Lyd&#233;ric LEFEBVRE</a> with <a href="https://www.linkedin.com/company/blackfield-security/">Blackfield Security</a>, <a href="https://ch.linkedin.com/in/lydericlefebvre">Lyd&#233;ric LEFEBVRE</a> with <a href="https://www.linkedin.com/company/blackfield-security/">Blackfield Security</a>, Noam Pomerantz, <a href="https://www.linkedin.com/in/vi5halch/">Vishal Chauhan</a>

Revision History

  • 2026-07-14: Information published.