A new cybersecurity threat has emerged targeting collaboration platforms like Microsoft Teams. Attackers can steal authentication tokens stored on a user’s computer, allowing them to impersonate the user and gain access to sensitive information such as chats, emails, and files—without needing passwords or triggering traditional login alerts. This method exploits weaknesses in how authentication data is stored locally, making it possible to bypass many of the standard security controls that organizations rely on to protect cloud communication environments.
For business and IT leaders, the incident underscores the growing risk of identity-based attacks that exploit endpoints instead of networks. Protecting against this type of threat requires a layered security approach that includes stronger endpoint protection, stricter conditional access policies, shorter token lifetimes, and close monitoring of API activity. Employee awareness is also critical—recognizing unusual device behavior or unexpected session changes can help detect compromises early and prevent broader breaches. Learn more at UC Today.