Vulnerabilities found in Signal, Google Duo, Facebook Messenger, JioChat, and Mocha. Could be triggered by placing a call to the target’s device ‘ no other action was needed. Researchers also found vulnerabilities in peer-to-peer calls of Telegram, Viber and Viber. All the vulnerabilities have been responsibly reported to the app makers and have since been fixed. Similar bugs might still be uncovered in other popular messaging platforms with video conferencing capabilities, says Google Project Zero researcher Natalie Silvanovich.
Source: https://www.helpnetsecurity.com/2021/01/21/bugs-video-chat-apps/