MICROSOFT COPILOT COWORK SECURITY FLAW LEAKS FILES

AI DESK■ 1 MIN READ

TUE, MAY 26, 2026

■ AI-SUMMARIZED FROM 2 SOURCES ▸ TIMELINE

A vulnerability in Microsoft Copilot Cowork allows unauthorized file exfiltration. The issue enables attackers to access and extract sensitive documents from the collaboration platform.

Microsoft Copilot Cowork, the company's AI-powered workspace tool, contains a security flaw that permits files to be extracted without authorization. The vulnerability exposes documents stored within the platform to potential data theft. Security researchers at Prompt Armor identified the issue and documented the attack vector. The flaw allows threat actors to bypass access controls and retrieve sensitive information. The severity of the vulnerability prompted discussion across the developer community, with 181 points and 39 comments on Hacker News indicating significant industry attention. The discovery raises questions about the security posture of AI-integrated enterprise tools. Microsoft has not yet published an official statement regarding patch timelines or mitigation steps. Organizations using Copilot Cowork should monitor their file access logs and await official guidance from Microsoft on remediation.

■ SOURCES

► Hacker News ► Bleeping Computer

■ SUMMARY WRITTEN BY AI FROM THE LINKS ABOVE

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MICROSOFT COPILOT COWORK SECURITY FLAW LEAKS FILES

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