CVE-2026-33102: Microsoft 365 Copilot

Critical severity, CVSS 9.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

Affected products

• Microsoft 365 Copilot: affected versions not specified

Published 2026-04-23. Last modified 2026-06-17.