CISA has published an advisory on a missing authentication for critical function vulnerability in Siemens LOGO! All versions of LOGO!8 BM (including SIPLUS variants) are affected. Successful exploitation of this vulnerability could allow an attacker to read and modify device configurations and obtain project files from affected devices. Siemens recommends applying defense-in-depth concepts, including the protection concept outlined in the system manual. CISA also recommends a series of measures to mitigate the vulnerability. Read the advisory at CISA.