{"id":"CVE-2016-6296","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-6296","generatedAt":"2026-10-27T17:57:29.325Z","title":"Integer signedness error in the simplestring_addn function in simplestring.c in xmlrpc-epi through 0.54.2, as used in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9, allows remote attackers to cause a denial of service (heap-based buffer…","description":"Integer signedness error in the simplestring_addn function in simplestring.c in xmlrpc-epi through 0.54.2, as used in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a long first argument to the PHP xmlrpc_encode_request function.","published":"2016-07-25T14:59:10.000Z","lastModified":"2026-06-17T00:50:46.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-119"],"affected":["php/php"],"epss":{"score":0.06271,"percentile":0.93527,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (6.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e6c48213c22ed50b2b987b479fcc1ac709394caa","source":"cve@mitre.org"},{"url":"http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html","source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2016/07/24/2","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://php.net/ChangeLog-5.php","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"http://php.net/ChangeLog-7.php","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-2750.html","source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2016/dsa-3631","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/92095","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1036430","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-3059-1","source":"cve@mitre.org"},{"url":"https://bugs.php.net/72606","tags":["Exploit","Issue Tracking"],"source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2019/11/msg00029.html","source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201611-22","source":"cve@mitre.org"},{"url":"https://support.apple.com/HT207170","source":"cve@mitre.org"},{"url":"http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e6c48213c22ed50b2b987b479fcc1ac709394caa","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2016/07/24/2","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://php.net/ChangeLog-5.php","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://php.net/ChangeLog-7.php","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-2750.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3631","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/92095","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1036430","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-3059-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.php.net/72606","tags":["Exploit","Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2019/11/msg00029.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201611-22","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT207170","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-6296","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."}