CVE-2021-30807: Apple Multiple Products Memory Corruption Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 28.8% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Affected products

• Apple iPadOS: before 14.7.1 (fixed in 14.7.1)
• Apple iPhone OS: before 14.7.1 (fixed in 14.7.1)
• Apple macOS: before 11.5.1 (fixed in 11.5.1)
• Apple watchOS: before 7.6.1 (fixed in 7.6.1)

Published 2021-10-19. Last modified 2026-06-17.