Skip to main content
VulnerabilityPublished

Exploiting Microsoft Teams: Impersonation and Spoofing Vulnerabilities Exposed

Source Check Point Research

0
Severity
Medium

Rated by Threat Radar

Data as of 4 Dec 2025, 13:18 UTC

What to do

AI-suggested

To mitigate these impersonation and spoofing vulnerabilities in Microsoft Teams, European organizations should implement a multi-layered approach: 1) Apply all available Microsoft Teams and Microsoft 365 security updates promptly once patches are released, monitoring official Microsoft advisories closely. 2) Enforce strict identity verification policies within Teams, including multi-factor authentication (MFA) for all users to reduce account compromise risk. 3) Configure Teams and Microsoft 365 security settings to restrict external communications and limit guest access where not necessary. 4) Implement advanced threat protection tools that can detect anomalous messaging patterns and flag potential spoofing attempts. 5) Conduct targeted user awareness training focused on recognizing impersonation and social engineering tactics specific to collaboration platforms. 6) Utilize logging and monitoring to identify suspicious activities, such as unexpected message sources or unusual file sharing behaviors. 7) Employ conditional access policies to restrict access based on device compliance and user risk profiles. 8) Collaborate with Microsoft support and security teams to stay informed about emerging threats and mitigation best practices. These steps go beyond generic advice by focusing on platform-specific configurations and organizational policies tailored to the Teams environment.

Description

By Andrey Charikov and Oded Vanunu Key Findings: Launched in March 2017, Microsoft Teams has become one of the most widely used communication and collaboration platforms in the world. As part of the Microsoft 365 family, Teams provides workplaces with chat, video conferencing, file storage, and application integration to more than 320 million monthly active […] The post Exploiting Microsoft Teams: Impersonation and Spoofing Vulnerabilities Exposed appeared first on Check Point Research .

References

Community reviews

Loading reviews…