Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to win a race condition.
Security updates
10.0.26200.9445 — https://support.microsoft.com/help/5124008
10.0.28000.2954 — https://support.microsoft.com/help/5124012
Vulnerabilities 1
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High 7.0
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.
Revision history
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#1
Information published.
References
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CVE-2026-78464 Windows MIDI Service Module Elevation of Privileges Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78464
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss