CVE-2021-30833: Apple Mac OS X

Medium severity, CVSS 5.5. EPSS: 42.7% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.0.1. Unpacking a maliciously crafted archive may allow an attacker to write arbitrary files.

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: before 12.0.1 (fixed in 12.0.1); from 11.6, before 11.6.1 (fixed in 11.6.1)

Published 2021-10-28. Last modified 2026-06-17.