Firmware Upgrade

i`m a degree student and need some help for my project. Is there any possibility to upgrade the firmware of a module (router/end device, with AT/transparent mode) to coordinators firmware.
And how can i realise it without buy a interface board. I have download X-CTU software and need now information how to connect the module to com port manually.
Pre-Thanks for help

Without interface board you can update the firmware on a xbee module. But for this you need a gateway that is associated with the xbee module. Either from the web UI of the gateway or from Device Cloud you can update the firmware on the xbee module.