Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Windows - CVE-2026-78464
Published: September 9, 2026
Vulnerability identifier: #VU148218
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-78464
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to a time-of-check time-of-use race condition in Windows MIDI Service Module when winning a race condition locally. A local user can exploit the race condition to escalate privileges.
Successful exploitation could grant SYSTEM privileges.
Affected software
Microsoft Windows
How to mitigate CVE-2026-78464
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954