CVE-2026-78464
High
Description
Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.0
Exploit probability—
Product
Microsoft Windows
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-367CWE-367
How to fix
Update
- microsoft windows_11_24h210.0.26100.9445 or later
- microsoft windows_11_25h210.0.26200.9445 or later
- microsoft windows_11_26h110.0.28000.2954 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_24h2 | v < 10.0.26100.9445 | 10.0.26100.9445 |
| microsoft windows_11_25h2 | v < 10.0.26200.9445 | 10.0.26200.9445 |
| microsoft windows_11_26h1 | v < 10.0.28000.2954 | 10.0.28000.2954 |
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