CVE-2021-30736: Apple iPadOS

High severity, CVSS 7.8. EPSS: 1.6% chance of exploitation in the next 30 days.

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. An application may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple iPadOS: before 14.6 (fixed in 14.6)
• Apple iPhone OS: before 14.6 (fixed in 14.6)
• Apple macOS: from 11.0.1, before 11.4 (fixed in 11.4)
• Apple tvOS: before 14.6 (fixed in 14.6)
• Apple watchOS: before 7.5 (fixed in 7.5)

Published 2021-09-08. Last modified 2026-06-17.