CriticalCritical vulnerability
CVE-2026-77903 (CVSS 9.0)
NVD · officialPublished Sep 17, 2026Risk 50/100EPSS 0.4%
Authentication bypass by spoofing in Microsoft Dataverse allows an unauthorized attacker to elevate privileges over a network.
Technical details
CVSS
9.0
AV:NetworkAC:HighPR:NoneUI:NoneC:HighI:HighA:High
Evidence and sources
This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.
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