CVE-2025-55696: NtQueryInformation Token function (ntifs.h) 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
- 0.03% (percentile: 8.7%)
Description
Time-of-check time-of-use (toctou) race condition in NtQueryInformation Token function (ntifs.h) allows an authorized attacker to elevate privileges locally.
FAQ
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 (23)
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
- Windows 11 Version 25H2 for x64-based Systems
- Windows 11 Version 25H2 for ARM64-based Systems
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
Microsoft Offensive Research & Security Engineering , Microsoft Offensive Research & Security Engineering
Revision History
- 2025-10-14: Information published.