What is CVE-2026-5501?

CVE-2026-5501 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Improper Certificate Signature Verification in X.509 Chain Validation Allows Forged Leaf Certificates

Which CVE IDs does CVE-2026-5501 cover?

CVE-2026-5501 covers the following CVE IDs: CVE-2026-5501. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

CVE-2026-5501High

Improper Certificate Signature Verification in X.509 Chain Validation Allows Forged Leaf Certificates

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-5501 →