Exploiting Microsoft Teams: Impersonation and Spoofing Vulnerabilities Exposed

**Executive summary:** Check Point Research discovered four critical manipulation and spoofing vulnerabilities in Microsoft Teams allowing guest or insider attackers to convincingly impersonate users, edit messages without an "Edited" label, spoof notification sender names (CVE-2024-38197), alter private chat display names via conversation topics, and forge caller identities in calls; Microsoft was notified in March 2024 and issued fixes through October 2025, but the issues illustrate severe risks to trust, phishing, financial fraud, and information integrity across the platform.