CVE-2021-30961: Apple Mac OS X

Medium severity, CVSS 5.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. Parsing a maliciously crafted audio file may lead to disclosure of user information.

Affected products

• Apple Mac OS X: from 10.15, up to and including 10.15.7; version 10.15.7 only
• Apple macOS: from 11.0, before 11.6.2 (fixed in 11.6.2)

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