CVE-2019-8746: Apple iCloud

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15, iOS 13, iCloud for Windows 7.14, iCloud for Windows 10.7, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, watchOS 6, iTunes 12.10.1 for Windows. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Affected products

• Apple iCloud: before 7.14 (fixed in 7.14); from 10.0, before 10.7 (fixed in 10.7)
• Apple iPhone OS: before 13.1 (fixed in 13.1)
• Apple iTunes: before 12.10.1 (fixed in 12.10.1)
• Apple Mac OS X: before 10.15 (fixed in 10.15)
• Apple tvOS: before 13 (fixed in 13)
• Apple watchOS: before 6.0 (fixed in 6.0)

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