CVE-2019-8521: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 0.8% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4. A malicious application may be able to overwrite arbitrary files.

Affected products

• Apple iPhone OS: before 12.2 (fixed in 12.2)
• Apple Mac OS X: before 10.14.4 (fixed in 10.14.4)

Published 2019-12-18. Last modified 2026-06-17.