You spend a fortune on firewalls and endpoint detection, but your biggest vulnerability might be clipped to your employees’ belts. An estimated 70% of physical access control systems still use legacy 125kHz proximity cards. These cards are not just outdated; they are a wide-open door for any determined attacker. They can be cloned in seconds with a $20 device bought online, leaving no sign of forced entry. A cloned badge doesn’t break a window or jimmy a lock. It walks right through the front door, and your logs will show a valid entry. By the time you know something is wrong, the damage is done. This isn’t a theoretical threat. It’s a real-world problem that requires a direct, no-nonsense assessment and a practical plan to fix it.