CVE-2017-13874: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. iOS before 11.2 is affected. The issue involves the "Mail" component. It might allow remote attackers to bypass an intended encryption protection mechanism by leveraging incorrect S/MIME certificate selection.

Affected products

• Apple iPhone OS: before 11.2 (fixed in 11.2)

Published 2017-12-25. Last modified 2026-06-17.