CVE-2018-4409: Apple iCloud

Medium severity, CVSS 6.5. EPSS: 1.6% chance of exploitation in the next 30 days.

A resource exhaustion issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

Affected products

• Apple iCloud: before 7.8 (fixed in 7.8)
• Apple iPhone OS: before 12.1 (fixed in 12.1)
• Apple iTunes: before 12.9.1 (fixed in 12.9.1)
• Apple Safari: before 12.0.1 (fixed in 12.0.1)
• Apple tvOS: before 12.1 (fixed in 12.1)

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