https://www.theregister.co.uk/2020/01/28/zoom_eavesdrop_hack/

Video-conferencing outfit Zoom had a major vulnerability in its URL scheme that miscreants could exploit to eavesdrop on private meetings.

That's according to infosec biz Check Point, which says it found snoops could brute-force their way into Zoom-hosted virtual meetings that were not secured by a password.