Hello Ken,
I see no one has responded to this post yet. So, at this point I would recommend contacting your local Xerox Support Department to speak with a Product Specialist for more assistance. Please call 1-800-821-2797 or 1-800-835-6100.
For the Printer_update.exe that is provided as a patch for CVE-2021-3438, is there an option to run this program in a silent mode. In an enterprise environment with many workstations, in order to deploy this with endpoint management software such as SCCM/MEM, it is best to be able to have no user interaction. So far I have found no way to run this update program without it giving the message that it was successful and then requiring the end user to click "OK" at the end.