CVE-2018-4189: Apple Tv

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

In iOS before 11.2.5, macOS High Sierra before 10.13.3, Security Update 2018-001 Sierra, and Security Update 2018-001 El Capitan, watchOS before 4.2.2, and tvOS before 11.2.5, a memory corruption issue exists and was addressed with improved memory handling.

Affected products

• Apple Apple Tv: before 11.2.5 (fixed in 11.2.5)
• Apple iPhone OS: before 11.2.5 (fixed in 11.2.5)
• Apple Mac OS X: from 10.13.0, before 10.13.3 (fixed in 10.13.3)
• Apple watchOS: before 4.2.2 (fixed in 4.2.2)

Published 2019-01-11. Last modified 2026-06-17.