CVE-2015-6999: Apple iPhone OS

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

The OCSP client in Apple iOS before 9.1 does not check for certificate expiry, which allows remote attackers to spoof a valid certificate by leveraging access to a revoked certificate.

Affected products

• Apple iPhone OS: up to and including 9.0.2

Published 2015-10-23. Last modified 2026-06-17.