CISA has published an advisory on authentication bypass by spoofing, authentication bypass by capture-replay, and unrestricted externally accessible lock vulnerabilities in Omron PLC CJ and CS Series. All versions of both products are affected. Successful exploitation of this vulnerability may allow remote code execution. Omron offers some measures to mitigate the mitigate the vulnerabilities. CISA also recommends a series of measures to mitigate the vulnerability. Read the advisory at CISA.