I'm old enough to have visually parsed the headline as "PC speaker" at first, and wondered what kind of amazing phreaking was going to drive the built-in speaker as a microphone and somehow get ingress into the computer. :-)

Yeah the headline isn't as interesting when truthful. I've never owned a "speaker" that plugs into USB. Only the good old analog audio jack, or a USB to toslink adapter that is purely a one-way stream.