CVE-2020-27933: Apple iCloud

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, iCloud for Windows 7.20, watchOS 6.2.8, tvOS 13.4.8, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. Processing a maliciously crafted image may lead to arbitrary code execution.

Affected products

• Apple iCloud: before 7.20 (fixed in 7.20)
• Apple iPadOS: before 13.6 (fixed in 13.6)
• Apple iPhone OS: before 13.6 (fixed in 13.6)
• Apple Mac OS X: from 10.15, before 10.15.6 (fixed in 10.15.6); version 10.15.6 only
• Apple tvOS: before 13.4.8 (fixed in 13.4.8)
• Apple watchOS: before 6.2.8 (fixed in 6.2.8)

Published 2021-04-02. Last modified 2026-06-17.