It can type as you
A USB HID device can behave like a keyboard. On an unlocked machine, that means it can enter text and shortcuts as the current user.
An unknown USB device can act like a keyboard. If the device is unlocked, it can type commands, open applications, and act as the signed-in user.
A USB HID device can behave like a keyboard. On an unlocked machine, that means it can enter text and shortcuts as the current user.
Email, files, browsers, cloud apps and internal tools may already be open or signed in. Physical access becomes digital access.
What a person could type manually, a device can type quickly and repeatedly. The safest control is to lock the device first.
Before leaving your desk, meeting room, train seat or shared workspace, lock the screen. It takes less than a second.
The device is not magic. The risk exists because the device was left unlocked and trusted input from a connected USB keyboard.