CVE-2021-30657: Apple macOS Unspecified Vulnerability

Medium severity, CVSS 5.5. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 68.5% chance of exploitation in the next 30 days.

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. A malicious application may bypass Gatekeeper checks. Apple is aware of a report that this issue may have been actively exploited..

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.