Occasionally I have seen the pointer start moving by itself when I am not touching the mouse or anything else on my laptop.
Unplugging the USB mouse and plugging it back in stops the pointer movement when this happens.
I have two other devices that move the pointer: a touchpad and a “mini-touchpad” in the middle of the keyboard so I suspect some kind of interference.
But I want to check if this is a potential security concern (e.g. someone or some illicit code is trying to control my mouse)?