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CVE-2026-59996: scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.

mediumCVSS 4.2CVE-2026-59996

CSIRTS triage

vendor: OpenSSHproduct: scpOtheraffected: before 10.4
What
scp may place a file in the parent directory of an intended directory during remote copy operations.
Who is affected
Deployments of OpenSSH scp before version 10.4 are affected.
Urgency
Remediation is medium due to the potential for misplacement of files.
Action
Upgrade OpenSSH to version 10.4 or later.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 4.2
Published
2026-07-02
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59996

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-2026-59996coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for scp in OpenSSH

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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