CVE-2021-30913: Apple Mac OS X

Medium severity, CVSS 5.5. EPSS: 1.6% chance of exploitation in the next 30 days.

The issue was addressed with improved permissions logic. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.1. An unprivileged application may be able to edit NVRAM variables.

Affected products

• Apple Mac OS X: from 10.15, before 10.15.7 (fixed in 10.15.7); version 10.15.7 only
• Apple macOS: from 11.0, before 11.6.1 (fixed in 11.6.1); version 12.0 only

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