CVE-2019-8531: Apple iPhone OS

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

A validation issue existed in Trust Anchor Management. This issue was addressed with improved validation. This issue is fixed in watchOS 5.2, macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra, iOS 12.2. An untrusted radius server certificate may be trusted.

Affected products

• Apple iPhone OS: before 12.2 (fixed in 12.2)
• Apple Mac OS X: before 10.14.4 (fixed in 10.14.4)
• Apple watchOS: before 5.2 (fixed in 5.2)

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