CVE-2020-36521: Apple iCloud

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iCloud for Windows 11.4, iOS 14.0 and iPadOS 14.0, watchOS 7.0, tvOS 14.0, iCloud for Windows 7.21, iTunes for Windows 12.10.9. Processing a maliciously crafted tiff file may lead to a denial-of-service or potentially disclose memory contents.

Affected products

• Apple iCloud: before 7.21 (fixed in 7.21); from 11.0, before 11.4 (fixed in 11.4)
• Apple iPadOS: before 14.0 (fixed in 14.0)
• Apple iPhone OS: before 14.0 (fixed in 14.0)
• Apple iTunes: before 12.10.9 (fixed in 12.10.9)
• Apple macOS: before 10.15.7 (fixed in 10.15.7)
• Apple tvOS: before 14.0 (fixed in 14.0)
• Apple watchOS: before 7.0 (fixed in 7.0)

Published 2022-09-23. Last modified 2026-06-17.