CVE-2014-1266: Apple iPhone OS

High severity, CVSS 7.4. EPSS: 5.7% chance of exploitation in the next 30 days.

The SSLVerifySignedServerKeyExchange function in libsecurity_ssl/lib/sslKeyExchange.c in the Secure Transport feature in the Data Security component in Apple iOS 6.x before 6.1.6 and 7.x before 7.0.6, Apple TV 6.x before 6.0.2, and Apple OS X 10.9.x before 10.9.2 does not check the signature in a TLS Server Key Exchange message, which allows man-in-the-middle attackers to spoof SSL servers by (1) using an arbitrary private key for the signing step or (2) omitting the signing step.

Affected products

• Apple iPhone OS: from 6.0, before 6.1.6 (fixed in 6.1.6); from 7.0, before 7.0.6 (fixed in 7.0.6)
• Apple Mac OS X: from 10.9, before 10.9.2 (fixed in 10.9.2)
• Apple tvOS: from 6.0, before 6.0.2 (fixed in 6.0.2)

Published 2014-02-22. Last modified 2026-06-17.