Integer underflow in Windows and Windows Server - CVE-2026-50308

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Main Vulnerability Database Vulnerabilities #VU137976

Integer underflow in Windows and Windows Server - CVE-2026-50308

Published: July 17, 2026


Vulnerability identifier: #VU137976
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-50308
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server

Detailed vulnerability description

The vulnerability allows a local attacker to execute arbitrary code.

The vulnerability exists due to integer underflow in Windows NTFS when parsing input. A local attacker can trigger the flaw to execute arbitrary code.


How to mitigate CVE-2026-50308

Install security update from vendor's website.

Sources