CVE-2016-4740
Apple iOS before 10, when Handoff for Messages is used, does not ensure that a Messages signin has occurred before displaying messages, which might allow attackers to obtain sensitive information via unspecified vectors.
Date published : 2016-09-18
http://lists.apple.com/archives/security-announce/2016/Sep/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html