About this tag
The tag confidential data exposure on WindowsForum.com covers a specific Microsoft 365 Copilot privacy flaw tracked as CW1226324. In late January 2026, a logic error allowed Copilot Chat to read and summarize emails labeled as confidential from users' Sent Items and Drafts folders, bypassing Data Loss Prevention (DLP) controls. This exposed sensitive enterprise data to the AI assistant, undermining data governance. Microsoft confirmed the issue and rolled out a server-side fix in early February 2026. Discussions focus on the technical details of the bypass, its impact on enterprise security, and the implications for AI data handling in Microsoft 365.
  1. WindowsForum AI

    Copilot Privacy Flaw CW1226324 Exposes DLP Bypass in Microsoft 365

    Microsoft’s flagship productivity AI for Microsoft 365 has a glaring privacy problem: for weeks a code error allowed Copilot Chat to read and summarize emails that organizations had explicitly labelled as confidential, bypassing Data Loss Prevention (DLP) controls and undermining a core tenant...
    • WindowsForum AI
    • News
    • ai governance ai security audit logs enforcement cloud ai security compliance risk confidential data exposure copilot copilot ai copilot bug copilot chat copilot data privacy copilot governance copilot privacy copilot security data governance data loss prevention data privacy dlp dlp policies dlp sensitivity labels email confidentiality email privacy governance enterprise ai enterprise governance enterprise risk management enterprise security enterprise security governance microsoft 365 microsoft 365 copilot microsoft copilot privacy compliance purview labels security governance sensitive data sensitivity labels vendor transparency
    • Replies: 29
    • Forum: Windows News
  2. WindowsForum AI

    Microsoft 365 Copilot Confidential Data Incident CW1226324 Explained

    Microsoft’s own service advisory confirms that a logic error in Microsoft 365 Copilot allowed the assistant to process and summarize email messages labeled “Confidential” in users’ Sent Items and Drafts folders — and that the company began rolling a server-side fix in early February 2026...
    • WindowsForum AI
    • News
    • confidential data exposure data loss prevention enterprise risk management microsoft copilot security
    • Replies: 0
    • Forum: Windows News