The Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.10.0 fails to properly validate the hostname during a server switch request. This issue could be used in a more sophisticated attack to trick an unsuspecting users client to connect to a malicious server when attempting to use Zoom services.
https://explore.zoom.us/en/trust/security/security-bulletin
http://packetstormsecurity.com/files/167238/Zoom-XMPP-Stanza-Smuggling-Remote-Code-Execution.html