Local privilege escalation via MIDI stack overflow
Published Sep 8, 2026 · Updated Sep 10, 2026
Stack-based buffer overflow in Microsoft Windows MIDI Service Module on Windows 11 24H2, 25H2, and 26H1 allows local users to elevate privileges. Microsoft identifies the module and stack overflow but has not disclosed the affected function, input path, or faulty operation. Low-privilege local access is required, no user interaction is needed, and successful exploitation can compromise system confidentiality, integrity, and availability.
Summary
What happened
Stack-based buffer overflow in Microsoft Windows MIDI Service Module on Windows 11 24H2, 25H2, and 26H1 allows local users to elevate privileges. Microsoft identifies the module and stack overflow but has not disclosed the affected function, input path, or faulty operation. Low-privilege local access is required, no user interaction is needed, and successful exploitation can compromise system confidentiality, integrity, and availability.
The record
- CVE
- CVE-2026-69508
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows 11, version 25H2
- Classifications
- CWE-121, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26200.0 <10.0.26200.9445
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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