What is CVE-2026-6331?

CVE-2026-6331 is a security advisory published by Microsoft Security Response Center (MSRC) with Low severity. HMAC zero-length tag forgery in EVP_DigestVerifyFinal

Which CVE IDs does CVE-2026-6331 cover?

CVE-2026-6331 covers the following CVE IDs: CVE-2026-6331. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-6331?

CVE-2026-6331 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

CVE-2026-6331LowCVSS 7.5

HMAC zero-length tag forgery in EVP_DigestVerifyFinal

Vendor

Microsoft Security Response Center (MSRC)

Published

July 1, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-6331 →