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CVE-2026-12064: proto-default skips SSH verification

highCVSS 7.5CVE-2026-12064

CSIRTS triage

Other
What
The proto-default configuration skips SSH verification, which can lead to security risks.
Who is affected
Deployments using SSH configurations are affected.
Urgency
Remediation is urgent due to the high severity of the vulnerability (CVSS 7.5).
Action
Ensure SSH verification is properly configured to mitigate this issue.

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
2026-07-02
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-12064

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-12064coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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