https://www.siliconvalley.com/2019/07/09/zoom-video-says-no-indication-its-users-have-been-hit-by-mac-webcam-security-flaw/

Companies that use Zoom Video Communications’ video conferencing app for Apple’s Mac computers are being advised to check their security settings due to a flaw that could allow any website to commandeer those Macs’ web cameras.

In a Medium blog post, security researcher Jonathan Leitschuh detailed the flaw, which potentially impacts the Macs at 750,000 businesses worldwide. The vulnerability is said to allow a website to be able to join a Zoom video call without the permission of the computer’s user. Once in on the call, a hacker could potentially do everything from turning on other apps that had been turned off and launching denial of service attacks without a computer user’s permission.