CVE-2021-21936: Advantech R-Seenet

High severity, CVSS 8.8. EPSS: 1.4% chance of exploitation in the next 30 days.

A specially-crafted HTTP request can lead to SQL injection. An attacker can make authenticated HTTP requests to trigger this vulnerability at ‘health_alt_filter’ parameter. This can be done as any authenticated user or through cross-site request forgery.

Affected products

• Advantech R-Seenet: version 2.4.15 only

Published 2021-12-22. Last modified 2026-06-17.