{"id":"CVE-2015-4000","url":"https://www.cyber-defence.io/tools/cve/CVE-2015-4000","generatedAt":"2026-11-05T06:19:59.901Z","title":"The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a…","description":"The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the \"Logjam\" issue.","published":"2015-05-21T00:59:00.000Z","lastModified":"2026-06-17T00:26:37.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-310","CWE-295"],"affected":["openssl/openssl","canonical/ubuntu linux","hp/hp-ux","ibm/content manager","oracle/jrockit","debian/debian linux","oracle/jdk","oracle/jre","suse/linux enterprise desktop","suse/linux enterprise server","suse/linux enterprise software development kit","suse/suse linux enterprise server","apple/iphone os","apple/mac os x","mozilla/network security services","oracle/sparc-opl service processor","apple/safari","google/chrome","microsoft/internet explorer","mozilla/firefox","opera/opera browser","mozilla/firefox esr","mozilla/seamonkey","mozilla/thunderbird","mozilla/firefox os"],"epss":{"score":0.9986,"percentile":0.99962,"date":"2026-11-04","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 99.9%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://aix.software.ibm.com/aix/efixes/security/sendmail_advisory2.asc","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04876402","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04949778","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10681","tags":["Third Party 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