Microsoft Teams Flaws Exposed: Attackers Could Impersonate Executives and Forge Caller Identity Vulnerability Report Microsoft Teams Flaws Exposed: Attackers Could Impersonate Executives and Forge Caller Identity Do Son November 5, 2025 0 Check Point exposed four critical flaws in Microsoft Teams. Attackers could forge executive caller IDs, silently edit messages without trace, and spoof notifications for BEC and espionage.