This 'fascinating' Microsoft Excel security flaw teams up spreadsheets and Copilot Agent to steal data
PUBLISHED Wednesday, March 11, 2026 · sead fadilpašić
AI BRIEFING
- ⬤ Microsoft Excel teams up with Copilot Agent to steal data
- ⬤ The security flaw exploits spreadsheet functionality to bypass user control
- ⬤ Researchers warn users of potential data theft via malicious Excel spreadsheets
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