Microsoft Teams Vulnerability Enables Remote Code Execution and Data Compromise

EXECUTIVE SUMMARY:

A remote code execution (RCE) vulnerability has been identified CVE-2025-53783 in Microsoft Teams, which could allow an unauthorized attacker to gain the ability to read, write, and delete user messages and data by executing malicious code within the application. The flaw stems from a heap-based buffer overflow, a memory corruption issue that can be exploited to overwrite sensitive data or execute arbitrary code in the context of Teams. Successful exploitation requires user interaction, such as clicking a crafted link or opening a malicious file, and while the attack complexity is considered high, the potential impact on confidentiality, integrity, and availability of user data is severe. It is strongly recommended to apply the latest security updates without delay to mitigate the risk, as exploitation could lead to full data compromise in enterprise environments. The vulnerability has a CVSS score of 7.5.