CVE-2021-1811: Apple iCloud

Medium severity, CVSS 6.5. EPSS: 1.7% chance of exploitation in the next 30 days.

A logic issue was addressed with improved state management. This issue is fixed in iTunes 12.11.3 for Windows, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iCloud for Windows 12.3, macOS Big Sur 11.3, watchOS 7.4, tvOS 14.5, iOS 14.5 and iPadOS 14.5. Processing a maliciously crafted font may result in the disclosure of process memory.

Affected products

• Apple iCloud: before 12.3 (fixed in 12.3)
• Apple iPadOS: before 14.5 (fixed in 14.5)
• Apple iPhone OS: before 14.5 (fixed in 14.5)
• Apple iTunes: before 12.11.3 (fixed in 12.11.3)
• Apple Mac OS X: from 10.14, up to and including 10.14.5; from 10.15, up to and including 10.15.5; version 10.14.6 only; version 10.15.6 only; version 10.15.7 only
• Apple macOS: from 11.0, before 11.3 (fixed in 11.3)
• Apple tvOS: before 14.5 (fixed in 14.5)
• Apple watchOS: before 7.4 (fixed in 7.4)

Published 2021-09-08. Last modified 2026-06-17.