NCCIC is aware of a public report of an improper authentication vulnerability affecting WAGO PFC200, a Programmable Logic Controller (PLC) device. According to this report, the vulnerability is exploitable by sending a TCP payload on the bound port. This report was released after attempted coordination with WAGO. NCCIC has notified the affected vendor of the report and has asked the vendor to confirm the vulnerability and identify mitigations. NCCIC is issuing this alert to provide notice of the report and identify baseline mitigations for reducing risks to these and other cybersecurity attacks.