CVE-2026-47645: Microsoft 365 Copilot

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.

Affected products

• Microsoft 365 Copilot: affected versions not specified

Published 2026-06-19. Last modified 2026-06-26.