CVE-2026-9547: SSH improper host validation

CSIRTS triage

What

This vulnerability involves improper host validation.

Who is affected

Users of SSH are affected.

Urgency

Remediation is critical due to a high CVSS score of 9.1 indicating severe risk.

Action

Apply the latest security patch for SSH to address this vulnerability.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

critical — CVSS 9.1

Published

2026-07-02

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-9547

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-2026-95470.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• medium[UPDATE] [medium] cURL: Multiple vulnerabilitiescert-bund
• highCVE-2026-9547: When a libcurl-based application performs transfers via `SCP://` or `SFTP://` and utilizes the …nvd
• unknownMultiple vulnerabilities in cURL and libcurl (June 24, 2026)cert-fr-avis

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