CVE-2020-3856: Apple iPadOS

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2. Processing a maliciously crafted string may lead to heap corruption.

Affected products

• Apple iPadOS: before 13.3.1 (fixed in 13.3.1)
• Apple iPhone OS: before 13.3.1 (fixed in 13.3.1)
• Apple Mac OS X: before 10.15.3 (fixed in 10.15.3)
• Apple tvOS: before 13.3.1 (fixed in 13.3.1)
• Apple watchOS: before 6.1.2 (fixed in 6.1.2)

Published 2020-02-27. Last modified 2026-06-17.