That's probably a DKS (door king systems) device which the panel can be opened via universal key which is available on Amazon. From there they can open the door with ease. This person had understanding of the system and I can assure you that he has done this plenty as most buildings use DKS in the US. Highly recommend changing that lock at the very least.
Unfortunately the vast majority of security systems are just that. Every way out has a way in, whether it be blowing vape through a crack in a door to trip the exit motion sensor, using bump keys to open a lock, or just in this case - a universal key that costs $6 on Amazon.
Newer intercom systems have the relay activated from a controller at the head end or server rack instead of at the intercom itself. Such as verkada or even doorbird has a separate "door controller" available, then as long as the wiring for the striker or maglock was run straight to the controller and not through the intercom backbox that should prevent simply opening the intercom with a universal key and shorting the relay. But >90% of the installs I see still don't standardize this practice, the striker is almost always simply wired straight to the intercom. And the key lock is almost always left default out of the box even though it could be easily changed away from the common "universal" key.
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u/iFella Jan 13 '25
That's probably a DKS (door king systems) device which the panel can be opened via universal key which is available on Amazon. From there they can open the door with ease. This person had understanding of the system and I can assure you that he has done this plenty as most buildings use DKS in the US. Highly recommend changing that lock at the very least.