Researchers at the University of California in Irvine have discovered that high resolution gaming mice can act as a microphone with a high enough sample rate, using special software installed on the PC. Vibrations in the air, transferred to the mouse mat can be picked up by the sensors, filtered and produce recognisable speech in the right circumstances.
Users of normal mice have little to worry about, but as they point out, anti malware vendors don’t currently treat mouse input as an attack vector.
Read all about it here:
Invisible Ears at Your Fingertips: Acoustic Eavesdropping via Mouse Sensors
https://arxiv.org/html/2509.13581v1
Unix/BSD users are not in danger, as the attack won’t work with a keyboard.