Main Vulnerability Database Vulnerabilities #VU126072

#VU126072 Double free in Windows Server and Windows - CVE-2026-26166

Published: April 14, 2026

Vulnerability identifier: #VU126072

Vulnerability risk: Low

CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2026-26166

CWE-ID: CWE-415

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
Windows Server
Windows

Software vendor:
Microsoft

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to a boundary error in Windows Shell. A local user can win a race condition and gain elevated privileges on the system.

Install updates from vendor's website.