Serious security vulnerabilities in dormakaba's Saflok electronic RFID locks

From the site:

Unsaflok is a series of serious security vulnerabilities in dormakaba’s Saflok electronic RFID locks, commonly used in hotels and multi-family housing environments.

When combined, the identified weaknesses allow an attacker to unlock all rooms in a hotel using a single pair of forged keycards. Over three million hotel locks in 131 countries are affected.