Vulnerability in Microsoft Windows 11 Version 24h2

CVE-2026-69440

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

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-69440?
CVE-2026-69440 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2026-09-08.
How severe is CVE-2026-69440?
High severity. CVSS v3 base score is 7.0 out of 10.