WebKit in Apple iOS before 10, iTunes before 12.5.1 on Windows, iCloud before 6.0 on Windows, and Safari before 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.
https://support.apple.com/HT207158
https://support.apple.com/HT207157
https://support.apple.com/HT207147
https://support.apple.com/HT207143
http://www.securitytracker.com/id/1036854
http://www.securityfocus.com/bid/93066
http://lists.apple.com/archives/security-announce/2016/Sep/msg00013.html
http://lists.apple.com/archives/security-announce/2016/Sep/msg00012.html
http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html
http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.html