CVE-2020-9978: Apple iPadOS

Medium severity, CVSS 4.5. EPSS: 0.5% chance of exploitation in the next 30 days.

This issue was addressed with improved setting propagation. This issue is fixed in macOS Big Sur 11.0.1, tvOS 14.0, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.0, iOS 14.0 and iPadOS 14.0. An attacker in a privileged network position may be able to unexpectedly alter application state.

Affected products

• Apple iPadOS: before 14.0 (fixed in 14.0)
• Apple iPhone OS: before 14.0 (fixed in 14.0)
• Apple Mac OS X: from 10.14, before 10.14.6 (fixed in 10.14.6); from 10.15, before 10.15.7 (fixed in 10.15.7); version 10.14.6 only; version 10.15.7 only
• Apple macOS: from 11.0, before 11.1.0 (fixed in 11.1.0)
• Apple watchOS: before 7.0 (fixed in 7.0)

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