CVE-2020-27900: Apple macOS

Medium severity, CVSS 5.5. EPSS: 1% chance of exploitation in the next 30 days.

An issue existed in the handling of snapshots. The issue was resolved with improved permissions logic. This issue is fixed in macOS Big Sur 11.0.1. A malicious application may be able to preview files it does not have access to.

Affected products

• Apple macOS: before 11.0.1 (fixed in 11.0.1)

Published 2020-12-08. Last modified 2026-06-17.