CVE-2026-71342: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
CVE-2026-71342 is a use-after-free vulnerability in the Windows Remote Access Connection Manager component of Microsoft Windows 10 Version 1607 and related builds. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating 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 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, identified as CVE-2026-71342 and classified under CWE-416 (Use After Free), affects multiple builds of Microsoft Windows 10 Version 1607 and related versions. It arises from improper handling of memory in the Windows Remote Access Connection Manager, enabling an authorized local attacker to execute code with elevated privileges. The CVSS 3.1 base score is 7.0, reflecting high severity with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges on the affected Windows 10 systems. This could lead to full system compromise, including unauthorized access to sensitive data and disruption of system availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has provided an official fix for this vulnerability. It is recommended to apply the security updates as outlined in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71342 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-05T18:41:50.334Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71342","vendor":"Microsoft"}]
Threat ID: 6aa04540acd9273b49fa9c41
Added to database: 09/08/2026, 17:26:24 UTC
Last enriched: 10/16/2026, 21:43:37 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 25
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