CVE-2026-69891: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
CVE-2026-69891 is a use-after-free vulnerability in Windows Media on Microsoft Windows 10 Version 1607 and later versions. It allows an authorized local attacker to elevate privileges. The vulnerability has a high severity score of 7.0 and has been officially fixed by Microsoft.
CVSS v3.1
Score 7.0high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-416 (Use After Free), exists in Windows Media components of Microsoft Windows 10 Version 1607 and subsequent updates. An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The CVSS 3.1 base score is 7.0, indicating high severity, with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts to confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges, potentially gaining higher-level access to the system. This can compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69891 for update details and deployment instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:56:39.491Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69891","vendor":"Microsoft"}]
Threat ID: 6aa04536acd9273b49fa9ab2
Added to database: 09/08/2026, 17:26:14 UTC
Last enriched: 10/16/2026, 21:38:39 UTC
Last updated: 10/22/2026, 01:15:25 UTC
Views: 23
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