Default password for Cisco 7821 and 8851 IP phones

[TeleCare]

Dear community 

I registered IP phone 7821 and 8851 when they successfully registered I could not access the admin setting on the phone because it asks for password, note that I have not configured any password in my CME, 

Would you please guide me how to find the default password for these type of phones? 

[Jonathan Schulenberg · Accepted solution]

A quick Google search suggests it is “Cisco”.
https://supportforums.cisco.com/t5/ip-telephony/7841-admin-settings-password/td-p/2982871