A recent security disclosure highlights a flaw that could let attackers push malicious files to employees via Microsoft Teams. The report from a security portal emphasizes that the vulnerability could be misused to deliver harmful code masquerading as familiar documents.
Organizations relying on Microsoft Teams often keep default configurations that unintentionally widen exposure to outsiders. The exploit does not require advanced hacking skills; it can be carried out by altering the recipient’s identifiers in a POST request. In practical terms, a bad actor might send a file that looks like it originates from a trusted colleague or known sender, increasing the likelihood that the recipient will open it.
Security researchers warn that attackers can maximize impact by using domains and email addresses that closely resemble those of the target organization. Even though Teams flags messages from external users with an External tag, that label alone may not deter a user who encounters a suspicious file or link.
To reduce risk, Jumpsec recommends a careful review of Teams settings and tighter control over interactions with external contacts. Enforcing stricter policies on external communications and implementing more robust screening of messages and attachments can help lower the chances of a successful phishing-style attack within Teams.
Other voices in the field have noted related efforts and considerations in this space. Coverage from industry observers mentions discussions about defensive devices and security programs, including references to KasperskyOS, and how national or corporate strategies may evolve in response to hacker activity. The core takeaway is clear: a layered approach to endpoint security and configuration hygiene is essential to protect employees and data in environments that rely on collaboration tools like Teams.