CVE-2019-8538: Apple iPhone OS

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

A denial of service 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. Processing a maliciously crafted vcf file may lead to a denial of service.

Affected products

• Apple iPhone OS: before 12.2 (fixed in 12.2)
• Apple Mac OS X: from 10.14.3, 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.