CVE-2017-7143: Apple Mac OS X

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. macOS before 10.13 is affected. The issue involves the "Captive Network Assistant" component. It allows remote attackers to discover cleartext passwords in opportunistic circumstances by sniffing the network during use of the captive portal browser, which has a UI error that can lead to cleartext transmission without the user's awareness.

Affected products

• Apple Mac OS X: up to and including 10.12.6

Published 2017-10-23. Last modified 2026-06-17.