CVE-2025-49733: Win32k 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
- Less Likely
- Patch Tuesday
- 2025-Jul
- Released
- 2025-07-08
- Last Updated
- 2025-07-23
- EPSS Score
- 0.25% (percentile: 48.7%)
Description
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
FAQ
What privileges could be gained by an attacker who successfully exploited the vulnerability?
A local, authenticated attacker could gain elevated local system or administrator privileges through a vulnerability in the Win32k.sys driver.
Affected Products (21)
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 Server 2022 (Server Core installation)
- 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 23H2 for ARM64-based Systems
- Windows 11 Version 23H2 for x64-based Systems
- Windows Server 2022, 23H2 Edition (Server Core installation)
- Windows 11 Version 24H2 for ARM64-based Systems
- Windows 11 Version 24H2 for x64-based Systems
- Windows Server 2025
ESU
- Windows 11 Version 22H2 for ARM64-based Systems
- Windows 11 Version 22H2 for x64-based Systems
- Windows 10 Version 22H2 for x64-based Systems
- Windows 10 Version 22H2 for ARM64-based Systems
- Windows 10 Version 22H2 for 32-bit Systems
Security Updates (6)
Acknowledgments
Mathias Vorreiter Pedersen with Microsoft, Devin Jensen with Microsoft, Benjamin Rodes with Microsoft, George Hughey with Microsoft
Revision History
- 2025-07-08: Information published.
- 2025-07-23: Added an acknowledgement. This is an informational change only.