{"id":"CVE-2016-0736","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-0736","generatedAt":"2026-11-05T04:40:58.564Z","title":"This made it vulnerable to padding oracle attacks, particularly with CBC.","description":"In Apache HTTP Server versions 2.4.0 to 2.4.23, mod_session_crypto was encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This made it vulnerable to padding oracle attacks, particularly with CBC.","published":"2017-07-27T21:29:00.000Z","lastModified":"2026-06-17T00:38:07.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-310"],"affected":["apache/http server"],"epss":{"score":0.49024,"percentile":0.98885,"date":"2026-11-04","history":[{"date":"2026-09-21","score":0.46832,"percentile":0.9881},{"date":"2026-09-22","score":0.49024,"percentile":0.98828}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2016-12-23","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":40961,"kind":"exploit","title":"Apache mod_session_crypto - Padding Oracle","url":"https://www.exploit-db.com/exploits/40961","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/40961.py","file":"exploits/multiple/webapps/40961.py","published":"2016-12-23","added":"2016-12-23","updated":"2016-12-23","author":"RedTeam Pentesting GmbH","type":"webapps","platform":"multiple","port":null,"verified":false,"codes":["CVE-2016-0736"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.redteam-pentesting.de/advisories/rt-sa-2016-001.txt"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 49.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://rhn.redhat.com/errata/RHSA-2017-1415.html","source":"security@apache.org"},{"url":"http://www.debian.org/security/2017/dsa-3796","source":"security@apache.org"},{"url":"http://www.securityfocus.com/bid/95078","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"http://www.securitytracker.com/id/1037508","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:0906","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:1161","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:1413","source":"security@apache.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:1414","source":"security@apache.org"},{"url":"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us","tags":["Third Party 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Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20180423-0001/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208221","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/40961/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2017-04","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-0736","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."}