CVE-2026-77903CWE-290

CVE-2026-77903

Critical · published September 18, 2026

CVSS v3.1
9.0
EPSS
0%
Percentile
30.0
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00372 · 30.0th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-09-18T03:18Z
Affected products (1)
ProductVersionsFixed in
microsoft/dataverseall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77903 · [email protected]
EPSS history
Timeline
  • 19 SEP 03:54Z
    EPSS moved — → 0%
    epss
  • 17 SEP 22:55Z
    Microsoft Dataverse Elevation of Privilege Vulnerability
    cvelistv5