CVE-2026-6325: Out-of-bounds write in SetSuitesHashSigAlgo on oversized signature algorithms list

highCVSS 7.5CVE-2026-6325

CSIRTS triage

Other

What: An out-of-bounds write can occur when processing oversized signature algorithms.
Who is affected: Systems utilizing the affected cryptographic libraries.
Urgency: High urgency due to a CVSS score of 7.5, indicating significant risk.
Action: Apply the latest security updates for the cryptographic libraries.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6325

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-63250.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-6325	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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