Microsoft bug allowed Copilot to summarize confidential emails
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February 19, 2026
Microsoft confirmed a bug allowed its Copilot AI to summarize customers’ confidential emails without permission. The issue, tracked as CW1226324, has been active since January. It bypassed data loss prevention policies designed to protect sensitive information from ingestion into Microsoft’s large language model. The bug specifically affected Copilot Chat’s ability to read and outline draft […]
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