CVE-2022-21155: Fernhillsoftware Scada Server

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A specially crafted packet sent to the Fernhill SCADA Server Version 3.77 and earlier may cause an exception, causing the server process (FHSvrService.exe) to exit.

Affected products

• Fernhillsoftware Scada Server: up to and including 3.77

Published 2022-04-12. Last modified 2026-06-17.