CVE-2021-30784: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Multiple issues were addressed with improved logic. This issue is fixed in macOS Big Sur 11.5. A local attacker may be able to execute code on the Apple T2 Security Chip.

Affected products

• Apple Mac OS X: from 10.14.0, before 10.14.6 (fixed in 10.14.6); from 10.15, before 10.15.7 (fixed in 10.15.7); version 10.14.6 only; version 10.15.7 only
• Apple macOS: before 11.5 (fixed in 11.5)

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