What is CVE-2026-6291?

CVE-2026-6291 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Bleichenbacher padding oracle in PKCS#7 KTRI RSA PKCS#1 v1.5 decryption

Which CVE IDs does CVE-2026-6291 cover?

CVE-2026-6291 covers the following CVE IDs: CVE-2026-6291. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-6291?

CVE-2026-6291 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

CVE-2026-6291MediumCVSS 6.5

Bleichenbacher padding oracle in PKCS#7 KTRI RSA PKCS#1 v1.5 decryption

Vendor

Microsoft Security Response Center (MSRC)

Published

July 1, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-6291 →