High severity8.8NVD Advisory· Published Jan 28, 2022· Updated Jun 17, 2026
CVE-2021-40396
CVE-2021-40396
Description
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.
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Affected products
3- cpe:2.3:a:advantech:deviceon\/iservice:1.1.7:*:*:*:*:*:*:*
- Advantech/DeviceOn/iServicedescription
- Range: =1.1.7
Patches
Vulnerability mechanics
References
1- talosintelligence.com/vulnerability_reports/TALOS-2021-1408nvdExploitThird Party Advisory
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