CVE-2021-30733: Apple iPadOS

Medium severity, CVSS 5.5. EPSS: 1% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted font may result in the disclosure of process memory.

Affected products

• Apple iPadOS: before 14.6 (fixed in 14.6)
• Apple iPhone OS: before 14.6 (fixed in 14.6)
• Apple Mac OS X: from 10.14.0, up to and including 10.14.5; version 10.14.6 only; version 10.15 only; version 10.15.1 only; version 10.15.2 only; version 10.15.3 only; …
• 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.