CVE-2018-4140: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 3.1% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. iOS before 11.3 is affected. The issue involves the "Telephony" component. It allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a Class 0 SMS message.

Affected products

• Apple iPhone OS: before 11.3 (fixed in 11.3)

Published 2018-04-03. Last modified 2026-06-17.