CVE-2018-4263: Apple iCloud

High severity, CVSS 8.8. EPSS: 2% chance of exploitation in the next 30 days.

Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.

Affected products

• Apple iCloud: before 7.6 (fixed in 7.6)
• Apple iPhone OS: before 11.4.1 (fixed in 11.4.1)
• Apple iTunes: before 12.8 (fixed in 12.8)
• Apple Safari: before 11.1.2 (fixed in 11.1.2)
• Apple tvOS: before 11.4.1 (fixed in 11.4.1)

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