Unpatched Hotel Locks Leave Millions of Rooms Vulnerable to Hackers

A vulnerability was found that allows hackers to unlock over 3 million hotel room doors worldwide using RFID hacking methods
The hack involves cloning a hotel keycard and exploiting weaknesses in the encryption to create a "master keycard"
With just two taps of the cloned cards, the hackers can unlock any door in the hotel that uses the vulnerable Saflok lock system
The lock manufacturer Dormakaba has notified hotels and provided software updates, but many locks remain unpatched years later
Hotels should update their systems, and guests should bolt doors and not leave valuables, as backups to vulnerable locks