CVE-2021-30776: Apple iPhone OS

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

A logic issue was addressed with improved validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-004 Catalina. Playing a malicious audio file may lead to an unexpected application termination.

Affected products

• Apple iPhone OS: before 14.7 (fixed in 14.7)
• Apple Mac OS X: from 10.15, up to and including 10.15.6; version 10.15.7 only
• Apple macOS: before 11.5 (fixed in 11.5)
• Apple tvOS: before 14.7 (fixed in 14.7)
• Apple watchOS: before 7.6 (fixed in 7.6)

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