Researchers at A Security have discovered a critical bug in Zoom that allows attackers to assume full control of a participant’s device by exploiting a flawed screen-sharing function. The vulnerability exists in the Zoom Workspace app for Windows, Mac, iOS, Android, and Linux. When a user launches the annotation tool while sharing their screen, the bug allows attackers to remotely execute malicious code and access participants’ devices. “Users can help keep themselves secure by applying the latest updates,” Zoom adds. This comes after Apple issued emergency macOS updates to fix a similar screen-sharing flaw that allowed attackers to view a user’s screen, open files, and launch apps.