CVE-2016-4639: Apple Mac OS X

High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Login Window in Apple OS X before 10.11.6 does not properly initialize memory, which allows local users to cause a denial of service via unspecified vectors.

Affected products

• Apple Mac OS X: up to and including 10.11.5

Published 2016-07-22. Last modified 2026-06-17.