Add new admin user to MySQL
You should look into resetting the root password.
Normally the root user shouldn't be used for any enterprise package, however "shouldn't" isn't much of a guarantee.

Your first action SHOULD be to ask around for the root password or look in whatever password storage your company might be using. 

If all else fails and you have to reset the passwored, you can find out how here.
Alternatively you could use --skip-grant-tables, and create a new admin user, however this is very insecure, and would be best done during a maintenance window with restriction of the network access.