CVE-2018-11138: Quest KACE System Management Appliance Remote Command Execution Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2022-03-25. EPSS: 91.7% chance of exploitation in the next 30 days.

The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible by anonymous users and can be abused to execute arbitrary commands on the system.

Affected products

• Quest KACE System Management Appliance: version 8.0.318 only

Published 2018-05-31. Last modified 2026-08-13.