Try to guess the password using burp suite intruder.
Password:
Password List:
admin
root
test
administrator
password
Pass
PASS
PASSWORD
passwd
Pss
Pass
Pass123
test123
cheese
sayCheese
testing
Test
TEST
ADMIN
PASSWORD
TESTING
test
administrator
password
Pass
PASS
PASSWORD
passwd
Pss
Pass
Pass123
test123
cheese
sayCheese