CVE-2017-2428: Apple iPhone OS

Critical severity, CVSS 9.8. EPSS: 2.6% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. iOS before 10.3 is affected. macOS before 10.12.4 is affected. tvOS before 10.2 is affected. watchOS before 3.2 is affected. The issue involves nghttp2 before 1.17.0 in the "HTTPProtocol" component. It allows remote HTTP/2 servers to have an unspecified impact via unknown vectors.

Affected products

• Apple iPhone OS: up to and including 10.2.1
• Apple Mac OS X: up to and including 10.12.3
• Apple tvOS: up to and including 10.1.1
• Apple watchOS: up to and including 3.1.3

Published 2017-04-02. Last modified 2026-06-17.