What’s happening: For all the talk about fake videos, it’s deepfake audio that has emerged as the first real threat to the private sector.

Symantec, a major cybersecurity company, says it has seen three successful audio attacks on private companies. In each, a company’s “CEO” called a senior financial officer to request an urgent money transfer.

Scammers were mimicking the CEOs’ voices with an AI program that had been trained on hours of their speech — culled from earnings calls, YouTube videos, TED talks and the like.

Millions of dollars were stolen from each company, whose names were not revealed. The attacks were first reported in the BBC.