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CVE-2026-47645CriticalMonitor

Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability

Severity Critical  ·  Urgency Monitor

Why it matters: Critical severity (CVSS 8.8)

Elevation of Privilege · Critical · CVSS 8.8. Affects: Microsoft 365 Copilot.

CVSS 8.8EPSS 0.4%Update published 2026-06-23Source updated 2026-06-23NVD

Affected: Microsoft 365 Copilot

Change history

2026-06-23 · First seen

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