Microsoft 365 Copilot Bug Summarizes Confidential Emails, Bypassing Security Policies
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Summary
Microsoft has acknowledged a bug in Microsoft 365 Copilot that has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention policies. The bug affects the Copilot 'work tab' chat feature, which incorrectly reads and summarizes emails stored in users' Sent Items and Drafts folders, including messages with confidentiality labels designed to restrict access. The issue was first detected on January 21 and is tracked under CW1226324.
Key quotes
· 3 pulledMicrosoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
According to a service alert seen by BleepingComputer, this bug (tracked under CW1226324 and first detected on January 21) affects the Copilot 'work tab' chat feature, which incorrectly reads and summarizes emails stored in users' Sent Items and Drafts folders.
The bug affects messages that carry confidentiality labels explicitly designed to restrict access.
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