Upgrading with fake pass

Why is it possible to upgrade epmp devices with fake pass? I have one epmp subscriber and have lost the pass from it. I discovered it in CNS with failed configuration status becouse of unknown pass. But i can upgrade this device why? 

Hi Haver, 

Do you mean fake password? CNS can upgrade an ePMP device without a proper password as long as it has the correct SNMP commnity string.