Welcome to my abode, spies!
Researchers reveal a hotel keycard hacking technique that lets a hacker almost instantly open RFID-based Saflok locks used in ~3M doors across 13K properties.
https://www.wired.com/story/saflok-hotel-lock-unsaflok-hack-technique/
Years ago I worked at a hotel that used Saflok, But at the time it was not RFID. Cards were punched with holes; a signal was sent to the lock to allow it to accept that hole pattern.
I don't recall what vulns were found for that.
@jamesbritt That one sounds like an easy hack just like this.
There was no radio communication. You would need to connect to the wires leading to the lock.
@jamesbritt Ah. I misunderstood then.