CVE-2019-8858: Apple Mac OS X

Medium severity, CVSS 5.3. EPSS: 0.7% chance of exploitation in the next 30 days.

A logic issue was addressed with improved state management. This issue is fixed in macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006. A user who shares their screen may not be able to end screen sharing.

Affected products

• Apple Mac OS X: before 10.15.1 (fixed in 10.15.1)

Published 2020-10-27. Last modified 2026-06-17.