CVE-2015-5900: Apple Mac OS X

High severity, CVSS 7.1. EPSS: 1.6% chance of exploitation in the next 30 days.

The protected range register in the EFI component in Apple OS X before 10.11 has an incorrect value, which allows attackers to cause a denial of service (boot failure) via a crafted app that writes to an unintended address.

Affected products

• Apple Mac OS X: up to and including 10.10.5

Published 2015-10-09. Last modified 2026-06-17.