Winbox Error Wrong Username Or Password

Connect via serial or console cable, then:

RouterOS Winbox Error: Wrong username or password - Beginner Basics - MikroTik community forum. MikroTik community forum winbox error wrong username or password

If you've forgotten your password, you'll need to reset it. Here's how: Connect via serial or console cable, then: RouterOS

Older WinBox versions may fail authentication against newer RouterOS. Download latest WinBox from MikroTik Connect via serial or console cable

Both usernames and passwords in RouterOS are strictly case-sensitive.