Main Vulnerability Database Vulnerabilities #VU148061

Integer overflow in Microsoft Windows and Windows Server - CVE-2026-71336

Published: September 9, 2026

Vulnerability identifier: #VU148061

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-71336

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to integer overflow or wraparound in Windows Work Folder Service when handling specially crafted network requests. A remote user can send a specially crafted request to execute arbitrary code.

User interaction is not required.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-71336

Install security update from vendor's website.

Microsoft Windows - addressed in versions 10 1607 10.0.14393.9512, 10 1809 10.0.17763.9245
Windows Server - addressed in versions 2012 R2 6.3.9600.23397, 2016 10.0.14393.9512, 2019 10.0.17763.9245, 2022 10.0.20348.5622, 2025 10.0.26100.33438

External References

Related Security Bulletins