CVE-2019-8573: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

An input validation issue was addressed with improved input validation. This issue is fixed in macOS Mojave 10.14.5, Security Update 2019-003 High Sierra, Security Update 2019-003 Sierra, iOS 12.3, watchOS 5.2.1. A remote attacker may be able to cause a system denial of service.

Affected products

• Apple iPhone OS: before 12.3 (fixed in 12.3)
• Apple Mac OS X: before 10.14.5 (fixed in 10.14.5)
• Apple watchOS: before 5.2.1 (fixed in 5.2.1)

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