{"id":"CVE-2016-1833","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-1833","generatedAt":"2026-10-28T00:17:38.863Z","title":"The htmlCurrentChar function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted…","description":"The htmlCurrentChar function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.","published":"2016-05-20T10:59:47.000Z","lastModified":"2026-06-17T00:42:43.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.0","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},"cwe":["CWE-125"],"affected":["apple/iphone os","apple/mac os x","apple/tvos","apple/watchos","debian/debian linux","canonical/ubuntu linux","redhat/enterprise linux desktop","redhat/enterprise linux server","redhat/enterprise linux server aus","redhat/enterprise linux server eus","redhat/enterprise linux server tus","redhat/enterprise linux workstation","xmlsoft/libxml2","mcafee/web gateway"],"epss":{"score":0.02559,"percentile":0.84976,"date":"2026-10-26","history":[{"date":"2026-09-21","score":0.04826,"percentile":0.91597},{"date":"2026-09-22","score":0.02559,"percentile":0.84398}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (2.56%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00001.html","tags":["Mailing List","Vendor Advisory"],"source":"product-security@apple.com"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00002.html","tags":["Mailing List","Vendor Advisory"],"source":"product-security@apple.com"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00003.html","tags":["Mailing List","Vendor Advisory"],"source":"product-security@apple.com"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00004.html","tags":["Mailing List","Vendor Advisory"],"source":"product-security@apple.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-2957.html","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html","tags":["Patch","Third Party Advisory"],"source":"product-security@apple.com"},{"url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"http://www.securityfocus.com/bid/90691","tags":["Third Party Advisory","VDB Entry"],"source":"product-security@apple.com"},{"url":"http://www.securitytracker.com/id/1035890","tags":["Third Party Advisory","VDB Entry"],"source":"product-security@apple.com"},{"url":"http://www.ubuntu.com/usn/USN-2994-1","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"http://xmlsoft.org/news.html","tags":["Release Notes","Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://access.redhat.com/errata/RHSA-2016:1292","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=636","tags":["Exploit","Mailing List","Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://bugzilla.gnome.org/show_bug.cgi?id=758606","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://git.gnome.org/browse/libxml2/commit/?id=0bcd05c5cd83dec3406c8f68b769b1d610c72f76","tags":["Patch","Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10170","tags":["Patch","Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT206564","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT206566","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT206567","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/HT206568","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://www.debian.org/security/2016/dsa-3593","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"https://www.tenable.com/security/tns-2016-18","tags":["Third Party Advisory"],"source":"product-security@apple.com"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00001.html","tags":["Mailing List","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00002.html","tags":["Mailing List","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00003.html","tags":["Mailing List","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2016/May/msg00004.html","tags":["Mailing List","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-2957.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/90691","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1035890","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2994-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xmlsoft.org/news.html","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2016:1292","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=636","tags":["Exploit","Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.gnome.org/show_bug.cgi?id=758606","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.gnome.org/browse/libxml2/commit/?id=0bcd05c5cd83dec3406c8f68b769b1d610c72f76","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10170","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT206564","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT206566","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT206567","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT206568","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2016/dsa-3593","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2016-18","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-1833","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."}