What is CVE-2026-40401?

CVE-2026-40401 is a security advisory published by Microsoft Security Response Center (MSRC) with Denial of Service severity. Windows TCP/IP Denial of Service Vulnerability

Which CVE IDs does CVE-2026-40401 cover?

CVE-2026-40401 covers the following CVE IDs: CVE-2026-40401. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-40401?

CVE-2026-40401 has a CVSS v3 base score of 7.1, published by Microsoft Security Response Center (MSRC).

CVE-2026-40401Denial of ServiceCVSS 7.1

Windows TCP/IP Denial of Service Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-40401 →

📋 Description

<p>Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service locally.</p>