CVE-2016-4711: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

CCrypt in corecrypto in CommonCrypto in Apple iOS before 10 and OS X before 10.12 allows attackers to discover cleartext information by leveraging a function call that specifies the same buffer for input and output.

Affected products

• Apple iPhone OS: up to and including 9.3.5
• Apple Mac OS X: up to and including 10.11.6

Published 2016-09-25. Last modified 2026-06-17.