CVE-2026-69725: CWE-415: Double Free in Microsoft Windows 10 Version 21H2
Description
CVE-2026-69725 is a high-severity vulnerability in Microsoft Windows 10 Version 21H2 involving a double free flaw in Windows Hello. This flaw allows an authorized local attacker to elevate privileges. The vulnerability affects multiple specific builds of Windows 10 21H2 and related versions. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
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
CVE-2026-69725 is a double free vulnerability (CWE-415) in the Windows Hello component of Microsoft Windows 10 Version 21H2. This vulnerability allows a local attacker with authorized access to elevate privileges by exploiting the double free condition. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. Multiple specific Windows 10 builds are affected, and Microsoft has released an official fix to address the issue.
Potential Impact
An authorized local attacker can exploit this double free vulnerability to elevate their privileges on the affected Windows 10 systems. This could lead to full system compromise, affecting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security updates provided by Microsoft for the affected Windows 10 versions to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:35:55.264Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69725","vendor":"Microsoft"}]
Threat ID: 6aa04523acd9273b49fa9893
Added to database: 09/08/2026, 17:25:55 UTC
Last enriched: 10/16/2026, 21:30:30 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 36
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