A physical access system is part of your security perimeter. Treat it like you would your firewall, your VPN, or your main domain controller. One default password can turn your access control system into an attacker’s welcome mat.

| Device Type | Common Default Username | Common Default Password | | :--- | :--- | :--- | | Web Interface (Admin) | admin | 123456 or admin | | Web Interface | superadmin | superadmin | | Software (Access 3.5 / 4.0) | admin | 123456 | | Attendance Software | administrator | (blank) or 1 | ⚠️ Some newer models force a password change on first boot. However, countless legacy devices (and lazy setups) still run with these factory defaults. Why Is This So Dangerous? A physical access system with a default password is like leaving your front door key under the mat—while also posting a sign that says “key under mat.”

In this post, we’ll break down the well-known default credentials for ZKAccess devices, why they are so dangerous, and—most importantly—how to lock them down for good. While models vary, security researchers and penetration testers have documented the most common factory defaults for ZKAccess/ZKTeco equipment:

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