CVE-2016-4721: Apple iPhone OS

Medium severity, CVSS 5.9. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. iOS before 10.1 is affected. macOS before 10.12.1 is affected. The issue involves the "IDS - Connectivity" component, which allows man-in-the-middle attackers to spoof calls via a "switch caller" notification.

Affected products

• Apple iPhone OS: up to and including 10.0.3
• Apple Mac OS X: up to and including 10.12.0

Published 2017-02-20. Last modified 2026-06-17.