CVE-2026-71336: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 10 Version 1607
Description
CVE-2026-71336 is an integer overflow or wraparound vulnerability in the Windows Work Folder Service affecting multiple versions of Microsoft Windows 10, including Version 1607. This flaw allows an authorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 8.8. Microsoft has released official fixes addressing this issue.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
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 involves an integer overflow or wraparound in the Windows Work Folder Service component of Microsoft Windows 10. Exploitation requires an attacker with authorized access and allows remote code execution over a network. Multiple Windows 10 versions are affected, specifically those versions prior to certain fixed builds. The vulnerability is tracked as CWE-190 and has a CVSS v3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution by an authorized attacker, potentially resulting in full compromise of the affected system. The impact includes complete loss of confidentiality, integrity, and availability of the 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 to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71336 for detailed patch information and update instructions.
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-2026-71336","vendor":"Microsoft"}]
Threat ID: 6aa0453eacd9273b49fa9c15
Added to database: 09/08/2026, 17:26:22 UTC
Last enriched: 10/16/2026, 21:43:06 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 35
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