A universal security device for preventing unlocking rotation of right and left door stanchions of cargo containers including a protective housing for a puck lock and channel shaped cross bar wings extending from its laterally opposite sides. A hook with claws for engaging a stanchion includes a palm with a locking tab having a locking bar receiving opening. The palm is insertable through one of the complimentary openings provided in each of the two side walls of the housing. At least one interior tab with a locking bar receiving opening is provided in the housing and when the locking rod of a puck lock engages the openings in the locking tabs, the cross bar structure prevents an unlocking rotation of the stanchion.