CVE-2018-4366: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 6.4% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1.

Affected products

• Apple iPhone OS: before 12.1 (fixed in 12.1)

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