We can assure you, Rittal does NOT use the Framework log4j in any of its IT Products.
You are absolutely safe to continue with CMC III / CMC-TC, IoT Interface, PDU, RiZone, LCP CW and DX, IT-Chiller, as well as the Client RCCMD. Also our IE-Software RiDiag does not use Framework log4j. SNMP plug-in cards (CS-121 or CS-141) used in our UPS systems are also not impacted.