I want to mask sensitive information like credentials and show them as all stars [*****] instead of actual value. I was wondering if there is an inbuilt option in GenieACS to do so. Please do let me know of any other solutions as well.
If it is a password, then try automatically reading it. Devices must not show passwords over tr069. If the password was set by the ACS, then the ACS will know it, until it is read from the CPE.