CVE-2020-9855: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in macOS Catalina 10.15.5. A local attacker may be able to elevate their privileges.

Affected products

• Apple Mac OS X: before 10.15.5 (fixed in 10.15.5)

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