Multiple families have reported their Ring cameras have been accessed by unknown third parties. The bad actors were able to access the video feeds and speakers of the cameras to frighten members of the affected households, including children. Ring has stated that the malicious parties probably accessed the cameras by using the victims' usernames and passwords, which were likely leaked in an unrelated data breach and recycled for the Ring cameras.
https://www.notebookcheck.net/Several-Ring-home-cameras-breached-recycled-passwords-likely-to-blame.447272.0.html