m1etz reported these vulnerabilities through the Computer Emergency Response Team, CERT-Bund, to CISA

Horner Automation’s RCC 972 with firmware version 15.40 has a static encryption key on the device. This could allow an attacker to perform unauthorized changes to the device, remotely execute arbitrary code, or cause a denial-of-service condition.

The Config-files of Horner Automation’s RCC 972 with firmware version 15.40 are encrypted with weak XOR encryption vulnerable to reverse engineering. This could allow an attacker to obtain credentials to run services such as File Transfer Protocol (FTP) a

Horner Automation’s RCC 972 firmware version 15.40 contains global variables. This could allow an attacker to read out sensitive values and variable keys from the device.