CVE-2015-5858: Apple iPhone OS

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

The CFNetwork HTTPProtocol component in Apple iOS before 9 allows remote attackers to bypass the HSTS protection mechanism, and consequently obtain sensitive information, via a crafted URL.

Affected products

• Apple iPhone OS: up to and including 8.4.1
• Apple watchOS: version 1.0 only

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