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.
Affected: Microsoft 365 Copilot
Change history
2026-06-23 · First seen