Microsoft Teams Really Could Be Bad for Your (Security) Health - Hackers Spoof Bosses, Send Fake Messages, and More

Why It Matters

The bugs exposed how trust mechanisms in widely‑used collaboration platforms can be weaponized, prompting enterprises to reassess security controls and patch management for remote‑work tools. Their exploitation could have led to costly fraud and data breaches, underscoring the critical need for rapid vulnerability response.

Summary

Check Point Research uncovered a series of Microsoft Teams flaws (CVE‑2024‑38197) that let attackers edit previously sent messages without an “Edited” tag, spoof mobile and desktop notifications, and alter displayed names in private chats and call invitations. The vulnerabilities could be used for phishing, social‑engineering, data theft, wire fraud, and malware distribution by masquerading as trusted executives or colleagues. Microsoft announced patches that were rolled out through October 2025, and the issues are now fully mitigated with no required action from users.