CVE-2021-40396: Advantech Deviceon/iservice

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A privilege escalation vulnerability exists in the installation of Advantech DeviceOn/iService 1.1.7. A specially-crafted file can be replaced in the system to escalate privileges to NT SYSTEM authority. An attacker can provide a malicious file to trigger this vulnerability.

Affected products

• Advantech Deviceon/iservice: version 1.1.7 only

Published 2022-01-28. Last modified 2026-06-17.