CVE-2021-30869: Apple iOS, iPadOS, and macOS Type Confusion Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 4.1% chance of exploitation in the next 30 days.

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

Affected products

• Apple iPadOS: before 14.4 (fixed in 14.4)
• Apple iPhone OS: from 12.0, before 12.5.5 (fixed in 12.5.5); from 14.0, before 14.4 (fixed in 14.4)
• Apple Mac OS X: from 10.14, up to and including 10.14.6; from 10.15, up to and including 10.15.6; version 10.14.6 only; version 10.15.7 only
• Apple macOS: from 11.0, before 11.2 (fixed in 11.2)

Published 2021-08-24. Last modified 2026-06-17.