Main Vulnerability Database Vulnerabilities #VU131319

Use-after-free in Microsoft products - CVE-2026-40358

Published: May 13, 2026

Vulnerability identifier: #VU131319

CSH Severity: High

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2026-40358

CWE-ID: CWE-416

Exploitation vector: Remote 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 remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Office. A remote attacker can execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Install updates from vendor's website.