CVE-2026-55653
An attacker can exploit multiple vulnerabilities in OpenSSH to conduct a denial of service attack, bypass security measures, manipulate data, or disclose confidential information.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited to conduct a denial of service attack, bypass security measures, manipulate data, or disclose confidential information.
- Who is affected
- Deployments of OpenSSH are affected.
- Urgency
- Remediation is medium urgency as exploitation is possible but not currently active.
- Action
- Update to the latest version of OpenSSH.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.
Advisory coverage (2)
- medium[UPDATE] [medium] OpenSSH: Multiple vulnerabilitiescert-bund · 2026-07-08
- mediumCVE-2026-55653: Openssh: double free in red hat enterprise linux versions of openssh dh-gex client path during…msrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-55653)