CVE-2016-4763: Apple iPhone OS

Medium severity, CVSS 6.8. EPSS: 1.2% chance of exploitation in the next 30 days.

WKWebView in WebKit in Apple iOS before 10, iTunes before 12.5.1 on Windows, and Safari before 10 does not properly verify X.509 certificates from HTTPS servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Affected products

• Apple iPhone OS: up to and including 9.3.5
• Apple iTunes: up to and including 12.4.3
• Apple Safari: up to and including 9.1.3

Published 2016-09-25. Last modified 2026-06-17.