CVE-2018-4237: Apple iPhone OS

High severity, CVSS 7.8. EPSS: 13.7% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "libxpc" component. It allows attackers to gain privileges via a crafted app that leverages a logic error.

Affected products

• Apple iPhone OS: before 11.4 (fixed in 11.4)
• Apple Mac OS X: before 10.13.5 (fixed in 10.13.5)
• Apple tvOS: before 11.4 (fixed in 11.4)
• Apple watchOS: before 4.3.1 (fixed in 4.3.1)

Published 2018-06-08. Last modified 2026-06-17.