The default password for EPX is system, you can change this password after logging in by doing the following:
In the Users folder, right-click System Administrator, and then click Open in the shortcut menu.
In the User editor, on the Details tab, click Password.
Type the new password twice in the appropriate boxes, and then click OK.
Click OK in the User editor to make the change permanent.
Refer to the Configuring the Secure Password Feature section of this guide for more information on creating a secure EPX user password.