CVE-2020-27893: Apple macOS

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue existed in screen sharing. This issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1. A user with screen sharing access may be able to view another user's screen.

Affected products

• Apple macOS: before 11.0.1 (fixed in 11.0.1)

Published 2021-04-02. Last modified 2026-06-17.