CVE-2026-69440

Windows MIDI Service Module Elevation of Privileges Vulnerability

State: Published
Severity: 7.0 High
Published: Sep 8, 2026
Updated: Oct 31, 2026
Reserved: Aug 3, 2026

Description

Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.9445Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.9445Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2954Affected

References

Windows MIDI Service Module Elevation of Privileges Vulnerabilityvendor-advisorypatch

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