{"id":"CVE-2016-6210","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-6210","generatedAt":"2026-10-27T19:50:31.633Z","title":"sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference…","description":"sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.","published":"2017-02-13T17:59:00.000Z","lastModified":"2026-06-17T00:50:38.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-200"],"affected":["openbsd/openssh"],"epss":{"score":0.88944,"percentile":0.99776,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":2,"verified":false,"firstPublished":"2016-07-18","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":40136,"kind":"exploit","title":"OpenSSH 7.2p2 - Username Enumeration","url":"https://www.exploit-db.com/exploits/40136","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/40136.py","file":"exploits/linux/remote/40136.py","published":"2016-07-20","added":"2016-07-20","updated":"2017-06-27","author":"0_o","type":"remote","platform":"linux","port":22,"verified":false,"codes":["CVE-2016-6210"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comopenssh-7.2p2.tar.gz","screenshotUrl":null,"referenceUrl":null},{"edbId":40113,"kind":"exploit","title":"OpenSSHd 7.2p2 - Username Enumeration","url":"https://www.exploit-db.com/exploits/40113","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/40113.txt","file":"exploits/linux/remote/40113.txt","published":"2016-07-18","added":"2016-07-18","updated":"2016-12-07","author":"Eddie Harari","type":"remote","platform":"linux","port":22,"verified":false,"codes":["CVE-2016-6210"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comopenssh-7.2p2.tar.gz","screenshotUrl":null,"referenceUrl":"http://seclists.org/fulldisclosure/2016/Jul/51"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 88.9%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://seclists.org/fulldisclosure/2016/Jul/51","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2016/dsa-3626","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/91812","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1036319","source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:2029","source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:2563","source":"cve@mitre.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201612-18","source":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20190206-0001/","source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/40113/","source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/40136/","source":"cve@mitre.org"},{"url":"https://www.openssh.com/txt/release-7.3","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://seclists.org/fulldisclosure/2016/Jul/51","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3626","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/91812","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1036319","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:2029","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:2563","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201612-18","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20190206-0001/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/40113/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/40136/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openssh.com/txt/release-7.3","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-6210","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}