CVE-2025-43506: Apple macOS

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A logic error was addressed with improved error handling. This issue is fixed in macOS Tahoe 26.1. iCloud Private Relay may not activate when more than one user is logged in at the same time.

Affected products

• Apple macOS: before 26.1 (fixed in 26.1)

Published 2025-12-12. Last modified 2026-10-07.