What is CVE-2026-40406?

CVE-2026-40406 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows TCP/IP Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-40406 cover?

CVE-2026-40406 covers the following CVE IDs: CVE-2026-40406. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-40406?

CVE-2026-40406 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

CVE-2026-40406HighCVSS 7.5

Windows TCP/IP Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-40406 →

🔗 CVE IDs covered (1)

📋 Description