CVE-2018-4339: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

This issue was addressed with a new entitlement. This issue is fixed in iOS 12.1. A local user may be able to read a persistent device identifier.

Affected products

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

Published 2020-10-27. Last modified 2026-06-17.