The NCCIC has published an advisory on an improper input validation vulnerability in Siemens SIMATIC TDC CP51M1. All versions prior to 1.1.7 are affected. Successful exploitation of this vulnerability could create a denial-of-service condition within UDP communication. Siemens recommends users update to Version 1.1.7 or later. The NCCIC also recommends a series of measures to mitigate the vulnerability. Read the advisory at CISA.