Microsoft Teams Bugs Expose Security Vulnerabilities for Users

Cybersecurity researchers have revealed significant flaws in Microsoft Teams that could compromise user security. According to The Hacker News, four vulnerabilities have been disclosed by Check Point, which could enable attackers to impersonate colleagues and manipulate conversations without detection.

These flaws allow an attacker to edit messages without leaving an 'Edited' label, making it appear as if the original sender wrote the message entirely. This manipulation extends to notifications, where attackers can modify the apparent sender's identity, tricking recipients into opening malicious messages that seem to come from trusted sources, including high-ranking executives.

The vulnerabilities have been described as a serious threat to digital trust within collaborative tools like Teams, which are increasingly used for business communications. The report further elaborates that these security gaps were first responsibly disclosed in March 2024.

Microsoft addressed some of these issues in August 2024 under the identifier CVE-2024-38197. However, it was only in the following months, September 2024 and October 2025, that patches were fully rolled out to mitigate these vulnerabilities.

The severity of these flaws is underscored by their potential to facilitate social engineering attacks, allowing attackers to manipulate communication and exploit the trust inherent in workplace messaging systems.

Check Point highlighted the risks posed not only by external attackers but also by malicious insiders, pointing out that these vulnerabilities threaten to erode the very foundation of trust that makes Teams a valuable collaboration tool.

Microsoft's acknowledgment of these vulnerabilities coincides with their broader security assessments, indicating that platforms like Teams are high-value targets for cybercriminals due to their extensive collaboration features and widespread adoption.

The company has noted that threat actors are increasingly leveraging Teams to approach targets under false pretenses, persuading them to grant remote access or execute malicious payloads under the guise of legitimate support personnel.

This situation emphasizes the growing need for organizations to secure user trust as much as their systems, a sentiment echoed by Oded Vanunu, head of product vulnerability research at Check Point, who stated that organizations must now secure what people believe, not just what systems process.

As these vulnerabilities surface, Microsoft Teams' role in digital communication is becoming critically scrutinized, reminding users and organizations alike of the importance of vigilance in their collaborative environments.