CVE-2026-71351: CWE-415: Double Free in Microsoft Windows 10 Version 1607
Description
CVE-2026-71351 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 and related builds involving a double free flaw in the Windows Routing and Remote Access Service (RRAS). This flaw allows an authorized local attacker to elevate privileges. The vulnerability affects multiple Windows 10 versions prior to specific patch levels. An official fix is available from 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 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
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 is a double free condition in the Windows Routing and Remote Access Service (RRAS) component of Microsoft Windows 10 Version 1607 and other related versions. Exploiting this flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability is tracked as CWE-415 (Double Free). Multiple Windows 10 builds are affected, with fixed versions indicated by upper bounds in the affected version ranges. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this double free vulnerability in RRAS to elevate their privileges, potentially gaining higher-level access on the affected Windows 10 systems. The CVSS v3.1 base score is 7.0 (high), reflecting high impact on confidentiality, integrity, and availability if successfully exploited.
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-2026-71351. No additional mitigation actions are indicated beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-05T18:41:50.335Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71351","vendor":"Microsoft"}]
Threat ID: 6aa04542acd9273b49fa9c6b
Added to database: 09/08/2026, 17:26:26 UTC
Last enriched: 10/16/2026, 21:44:10 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 43
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