CISA has published an advisory on an improper restriction of excessive authentication attempts vulnerability in Omron PLC CJ, CS and NJ. All versions of all three products are affected. Successful exploitation of this vulnerability could allow an attacker to brute force login credentials, obtain unauthorized access of the system, and may allow an attacker unauthorized access to the FTP interface. 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.