{"id":"CVE-2016-5426","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-5426","generatedAt":"2026-10-27T23:20:06.246Z","title":"PowerDNS (aka pdns) Authoritative Server before 3.4.10 allows remote attackers to cause a denial of service (backend CPU consumption) via a long qname.","description":"PowerDNS (aka pdns) Authoritative Server before 3.4.10 allows remote attackers to cause a denial of service (backend CPU consumption) via a long qname.","published":"2016-09-21T14:25:14.000Z","lastModified":"2026-06-17T00:49:24.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-399"],"affected":["powerdns/authoritative"],"epss":{"score":0.30631,"percentile":0.9823,"date":"2026-10-26","history":[{"date":"2026-09-21","score":0.33805,"percentile":0.98358},{"date":"2026-09-22","score":0.30631,"percentile":0.98162}]},"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 30.6%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.debian.org/security/2016/dsa-3664","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2016/09/09/3","tags":["Release Notes"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/92917","source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1036761","source":"secalert@redhat.com"},{"url":"https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3664","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2016/09/09/3","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/92917","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1036761","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-5426","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."}