What is CVE-2026-40359?

CVE-2026-40359 is a security advisory published by Microsoft Security Response Center (MSRC) with Remote Code Execution severity. Microsoft Excel Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-40359 cover?

CVE-2026-40359 covers the following CVE IDs: CVE-2026-40359. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-40359?

CVE-2026-40359 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

CVE-2026-40359Remote Code ExecutionCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-40359 →

📋 Description

<p>Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.</p>