CVE-2026-69784: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Description
CVE-2026-69784 is a use-after-free vulnerability in Windows Hello on Microsoft Windows 10 Version 21H2 that allows a local authorized attacker to elevate privileges. The vulnerability affects multiple builds of Windows 10 21H2 and related versions. It has a high severity with a CVSS score of 8.8. An official fix is available from Microsoft.
CVSS v3.1
Score 8.8high
Affected software
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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-69784, involves a use-after-free condition in the Windows Hello component of Microsoft Windows 10 Version 21H2. Exploitation requires local authorized access and can result in privilege escalation. The CVSS v3.1 score is 8.8, reflecting high impact on confidentiality, integrity, and availability. Multiple specific Windows 10 builds are affected, and Microsoft has released an official fix to address the issue. There are no known exploits in the wild at this time.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges, potentially gaining higher system rights than intended. The impact includes full compromise of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69784.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:47:19.708Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69784","vendor":"Microsoft"}]
Threat ID: 6aa04529acd9273b49fa9938
Added to database: 09/08/2026, 17:26:01 UTC
Last enriched: 10/16/2026, 21:33:33 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 21
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