CVE-2015-5824: Apple iPhone OS

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

The NSURL implementation in the CFNetwork SSL component in Apple iOS before 9 does not properly verify X.509 certificates from SSL servers after a certificate change, 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 8.4.1
• Apple Mac OS X: up to and including 10.10.5
• Apple watchOS: version 1.0 only

Published 2015-09-18. Last modified 2026-06-17.