The installer told us the password to our modem is highspeed, however, that password is not working. Can you reset the password for us?

Hello, I am the new IT guy for the company and I need access to the modem, but the default password was changed prior and nobody knows it. Can somebody reset my modem password to the default one please? Thanks in advance.

Hello, I am the new IT guy for the company and I need access to the modem, but the default password was changed prior and nobody knows it. Can somebody reset my modem password to the default one please? Thanks in advance.