An issue was discovered in certain Apple products. iOS before 10.3 is affected. Safari before 10.1 is affected. iCloud before 6.2 on Windows is affected. iTunes before 12.6 on Windows is affected. tvOS before 10.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.
https://support.apple.com/HT207617
https://support.apple.com/HT207607
https://support.apple.com/HT207601
https://support.apple.com/HT207600
https://support.apple.com/HT207599
http://zerodayinitiative.com/advisories/ZDI-17-241/