# Microsoft 365 Copilot

Type: Product

Source: Cyber Intelligence Brief — https://getcyberbrief.com/entity/microsoft-365-copilot
Canonical HTML page: https://getcyberbrief.com/entity/microsoft-365-copilot

## Timeline

- **2026-02-18**: Public Disclosure — Microsoft and security researchers confirm that Copilot has been bypassing DLP to summarize emails.
- **2026-02-18**: Mitigation Efforts — Microsoft begins addressing the Office bug to restore data protection policy enforcement.
- **2026-01-25**: Bug Emergence — Estimated start of the bug affecting Copilot's DLP enforcement mechanisms.

## Recent coverage (1 stories)

### Microsoft 365 Copilot Bug Bypasses DLP to Summarize Confidential Emails
2026-02-18 23:13:01 · Sentiment: Strongly negative · Impact: 8/10 · Sources: 2

A critical vulnerability in Microsoft 365 Copilot allowed the AI assistant to access and summarize confidential emails, bypassing established Data Loss Prevention (DLP) policies. The bug, active since late January, represents a significant breach of trust for enterprise customers relying on Microsoft's security framework for AI integration.
Full story: https://getcyberbrief.com/story/microsoft-copilot-dlp-bypass-bug

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This page is a machine-readable summary. Sentiment measures the directional read of each development for this entity, not the tone of the reporting; impact weights consequence, not syndication reach. See https://getcyberbrief.com/guides/methodology for the full editorial methodology.