CVE-2020-9856: Apple Mac OS X

Medium severity, CVSS 5.3. EPSS: 1.4% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in macOS Catalina 10.15.5. An application may be able to gain elevated privileges.

Affected products

• Apple Mac OS X: from 10.13, before 10.13.6 (fixed in 10.13.6); from 10.14, before 10.14.6 (fixed in 10.14.6); from 10.15, before 10.15.5 (fixed in 10.15.5); version 10.13.6 only; version 10.14.6 only

Published 2020-06-09. Last modified 2026-06-17.