CVE-2016-4640: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

Login Window in Apple OS X before 10.11.6 allows attackers to execute arbitrary code in a privileged context, obtain sensitive user information, or cause a denial of service (memory corruption) via a crafted app.

Affected products

• Apple Mac OS X: up to and including 10.11.5

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