> [...] the same credentials that allowed him to see and control his own device also provided access to live camera feeds, microphone audio [...]

Sorry what? Why would a vacuum cleaner even need a microphone?

As an impractical idea, echo location popped into my head.

Control by voice? Not that absurd.

Audio and video surveillance via robot vacuum is a feature: you can control the vacuum, see and hear the world from its perspective, and spy on your cats. I wish I were kidding.

https://youtu.be/TltYXEDoong?t=412

Who is "you" in that sentence?

One.

control what?

"get out of my room"?