Microsoft says Office bug exposed customers’ confidential emails to Copilot AI

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Microsoft says Office bug exposed customers’ confidential emails to Copilot AI

Image for the article: Microsoft says Office bug exposed customers’ confidential emails to Copilot AI

Microsoft says Office bug exposed customers’ confidential emails to Copilot AI

Wed Feb 18 2026

Privacy

Vulnerability

techcrunch.com

Microsoft said the bug meant that its Copilot AI chatbot was reading and summarizing paying customers' confidential emails, bypassing data protection policies.