CVE-2018-4436: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

A certificate validation issue existed in configuration profiles. This was addressed with additional checks. This issue affected versions prior to iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2.

Affected products

• Apple iPhone OS: before 12.1.1 (fixed in 12.1.1)
• Apple tvOS: before 12.1.1 (fixed in 12.1.1)
• Apple watchOS: before 5.1.2 (fixed in 5.1.2)

Published 2019-04-03. Last modified 2026-06-17.