CVE-2021-30655: Apple Mac OS X

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

An application may be able to execute arbitrary code with system privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. The issue was addressed with improved permissions logic.

Affected products

• Apple Mac OS X: from 10.15, up to and including 10.15.5; version 10.15.6 only; version 10.15.7 only
• Apple macOS: from 11.0, before 11.3 (fixed in 11.3)

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