CVE•Published 2026-06-23•0 articles on news•6 live references•NVD data
CVE-2026-55653
Vulnerability data via NVD (ingested)
CVSS v3.1
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS percentile
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Weaknesses (CWE)
Description
A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange (DH-GEX) client path. This occurs during FIPS (Federal Information Processing Standards) mode known-group validation when the client processes attacker-controlled DH-GEX group parameters. Successful exploitation leads to client-side process termination, resulting in a Denial of Service (DoS).
Timeline
Published 2026-06-23
Modified 2026-06-23
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-55653Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-55653Censys host search filtered to this CVE id.
grep.app
CVE-2026-55653Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-55653GitHub code search for direct mentions.
Google dork
"CVE-2026-55653" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-55653 on GitHub.
We haven't classified any articles referencing CVE-2026-55653 yet. The external references above still apply.