The NetxEIB OPC server has security vulnerabilities, allowing an attacker with access to the OPC interface to arbitrarily read and write the process memory, potentially leading to the execution of attacker-provided code.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55345/NB07-22.txt
Source: https://packetstormsecurity.com/files/55345/NB07-22.txt.html