CVE-2021-30856: Apple macOS

Critical severity, CVSS 9.1. EPSS: 0.9% chance of exploitation in the next 30 days.

This issue was addressed by adding a new Remote Login option for opting into Full Disk Access for Secure Shell sessions. This issue is fixed in macOS Big Sur 11.3. A malicious unsandboxed app on a system with Remote Login enabled may bypass Privacy preferences.

Affected products

• Apple macOS: from 11.0, before 11.3 (fixed in 11.3)

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