CVE-2018-4194: Apple iCloud

High severity, CVSS 8.8. EPSS: 1.9% chance of exploitation in the next 30 days.

In iOS before 11.4, iCloud for Windows before 7.5, watchOS before 4.3.1, iTunes before 12.7.5 for Windows, and macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.

Affected products

• Apple iCloud: before 7.5 (fixed in 7.5)
• Apple iPhone OS: before 11.4 (fixed in 11.4)
• Apple iTunes: before 12.7.5 (fixed in 12.7.5)
• Apple Mac OS X: from 10.13.0, before 10.13.5 (fixed in 10.13.5)
• Apple watchOS: before 4.3.1 (fixed in 4.3.1)

Published 2019-01-11. Last modified 2026-06-17.