FBI warns that some of the organization zoom meeting session has been disrupted, since hackers try to join their meeting and pulling pranks. Organization can refer HKCERT’s Zoom security guideline and should take several security measures to prevent hijacking attempts, such as making the meetings private and manage the screen-sharing .options.
For details, please refer to the below link:
https://www.bleepingcomputer.com/news/security/fbi-warns-of-ongoing-zoom-bombing-attacks-on-video-meetings/?&web_view=true
https://www.hkcert.org/security-guideline/10-measures-to-secure-zoom-meetings