CVE-2026-69440: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Windows 11 Version 24H2
Description
CVE-2026-69440 is a time-of-check time-of-use (TOCTOU) race condition vulnerability in the Windows MIDI Service Module of Microsoft Windows 11 Version 24H2. This flaw allows an authorized local attacker to elevate privileges. The vulnerability has a high severity rating with a CVSS score of 7. An official fix is available from Microsoft.
CVSS v3.1
Score 7.0high
Affected software
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a TOCTOU race condition in the Windows MIDI Service Module on Windows 11 Version 24H2. An authorized local attacker can exploit this flaw to elevate their privileges on the affected system. The issue affects specific builds of Windows 11 Version 24H2, and Microsoft has released an official fix to address it.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher-level access to the affected system. This can lead to full system compromise depending on the privileges gained.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69440 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T20:59:32.784Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69440","vendor":"Microsoft"}]
Threat ID: 6aa044faacd9273b49fa8081
Added to database: 09/08/2026, 17:25:14 UTC
Last enriched: 10/16/2026, 21:12:45 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 26
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