Main Vulnerability Database Vulnerabilities #VU131289

Use-after-free in Microsoft products - CVE-2026-40418

Published: May 13, 2026

Vulnerability identifier: #VU131289

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-2026-40418

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Office LTSC

Detailed vulnerability description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Office Click-To-Run. A local user can gain elevated privileges on the system.

Install updates from vendor's website.