CVE-2026-77903

CRITICAL
INFO Priority: 0.03 BB Relevance: 68/100
Published: 2026-09-17 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Changed
C: High
I: High
A: High

Description

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

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
microsoft dataverse -

References & Advisories (1)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

9.0 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.37%
Raw Score 0.003720
Percentile 31.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00372
2026-10-28
0.00372

Intelligence Sources

mitre ref →