EPC3928 Router default username/password reverts back to "cisco"

[fedroponce]

My cable company recently replaced my home router with a EPC3928, when it was installed, default user name is set to "cisco" and same password. Although I have changed via the management page, after a couple of days when I try to log back to the router's admin pages I have noticed it has reverted back to "cisco".  I have tried this several times, the username/password change works for a short period (a few hours) and then at some point reverts back. Is this normal? I would not like to have these well known credentials stick on my router.

[Austin Sabio]

I am suspecting one of the following: 

• Cable modem settings are controlled/synced by ISP. (if all features are affected, not only login credentials)
• Bug: requires a firmware update or factory default.  
• After updating username/password, save step is required. 
• Bad unit: needs to be replaced. 

If you're leasing the cable modem, contact your ISP. 

Please rate, if helpful. 

Thank you.

[fedroponce]

Thanks for the suggestions. It seems it is only the username/password which reverts back to default values. So far, all other options I have configured remain as I set them.

On the firmware... how can I find if there are any firmware updates available?

On the save step... I did that, in fact after updating the credentials I have to login again (now using the updated ones); for a couple of hours (actually varies) the updated credentials will work as expected but then, at some point they stop to work and I end up going back to the defaults.

[Austin Sabio]

Check if firmware update option is available via GUI. otherwise, as its managed by your cable company they can better assist you.

Please rate, if helpful. 

Thank you.

[Ben Skinner]

Down here in Australia our ISP (Telstra) sends config updates every 2 hours. This is due to the CPE doing shaping once they hit a limit.

[fedroponce]

Thank you all for the suggestions. I will reach out to my ISP to find out if this is something they are push updating. Thanks.