{"id":"CVE-2025-61984","title":"ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used","summary":"ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %…","severity":"low","cvss":3.6,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-159"],"vendor":"OpenBSD","product":"OpenSSH","affected":["OpenSSH < 10.1"],"published":"2025-10-06","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:09.487","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-61984","references":[{"url":"https://marc.info/?l=openssh-unix-dev&m=175974522032149&w=2","label":"cve@mitre.org"},{"url":"https://www.openssh.com/releasenotes.html#10.1p1","label":"cve@mitre.org"},{"url":"https://www.openwall.com/lists/oss-security/2025/10/06/1","label":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2025/10/07/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2025/10/12/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-61984-detection-script-remote-code-execution-vulnerability-affecting-openssh","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-61984-mitigation-script-remote-code-execution-vulnerability-affecting-openssh","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","exploit-available","cve.org"],"epss":0.00463,"epssPercentile":0.39958,"exploits":{"github":2,"githubRepos":["https://github.com/dgl/cve-2025-61984-poc","https://github.com/flyskyfire/cve-2025-61984-poc"],"checkedAt":"2026-10-27T16:48:18.560Z"},"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2025-10-08T03:55:10.734755Z"},"ingestedAt":"2026-09-08T15:33:26.996Z","slug":"CVE-2025-61984","body":"## Overview\n\nssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":32,"depthScoreParts":{"impact":19.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}