CVE-2021-21804: Advantech R-Seenet

Critical severity, CVSS 9.8. EPSS: 3.7% chance of exploitation in the next 30 days.

A local file inclusion (LFI) vulnerability exists in the options.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020). A specially crafted HTTP request can lead to arbitrary PHP code execution. An attacker can send a crafted HTTP request to trigger this vulnerability.

Affected products

• Advantech R-Seenet: version 2.4.12 only

Published 2021-07-16. Last modified 2026-06-17.