Sep 2026: Windows MIDI Service Module Elevation of Privileges Vulnerability
CVE-2026-78464 Published on September 8, 2026
Windows MIDI Service Module Elevation of Privileges Vulnerability
Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.
Weakness Type
What is a TOCTTOU Vulnerability?
The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.
CVE-2026-78464 has been classified to as a TOCTTOU vulnerability or weakness.
Products Associated with CVE-2026-78464
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Affected Versions
Microsoft Windows 11 Version 24H2:- Version 10.0.26100.0 and below 10.0.26100.9445 is affected.
- Version 10.0.26200.0 and below 10.0.26200.9445 is affected.
- Version 10.0.28000.0 and below 10.0.28000.2954 is affected.