Time-of-check Time-of-use (TOCTOU) Race Condition in Windows and Windows Server - CVE-2025-29969
Published: May 13, 2025 / Updated: February 27, 2026
Vulnerability identifier: #VU109097
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2025-29969
CWE-ID: CWE-367
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in MS-EVEN RPC. A remote user can win a race condition and execute arbitrary code on the target system.
How to mitigate CVE-2025-29969
Install updates from vendor's website.