CVE-2026-77903: Microsoft Dataverse

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Authentication bypass by spoofing in Microsoft Dataverse allows an unauthorized attacker to elevate privileges over a network.

Affected products

• Microsoft Dataverse: affected versions not specified

Published 2026-09-17. Last modified 2026-09-25.