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CVE-2026-77903CriticalEoPNetwork

Microsoft Dataverse Elevation of Privilege Vulnerability

No KEV listing collectedCVSS 9.0Fixed by Microsoft · service-side
MSRC advisory NVD CVE.org

Assessment

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

Severity
Critical
CVSS base score
9.0
Impact
Elevation of Privilege
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Not assessed
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
0.4%FIRST forecast dated 10 Nov 2026, for the following 30 days · FIRST percentile 31.5% · about EPSS
Customer action
Not required (service-side fix)
More details
CVSS vector
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
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Microsoft Dataverse
Weakness
CWE-290: Authentication Bypass by Spoofing
Issued by
Microsoft
Published
17 Sep 2026 · September 2026
Last revised
17 Sep 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
HighAC:H
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
ChangedS:C
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Microsoft Dynamics
1 affected product

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  5. Detection template: No Nuclei template listed · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
  6. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  7. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (60)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 10 Nov 2026 · 18:32:11 UTC EPSS0.4%; scored 9 Nov 2026 → 0.4%; scored 10 Nov 2026
  2. 9 Nov 2026 · 22:24:37 UTC EPSS0.4%; scored 8 Nov 2026 → 0.4%; scored 9 Nov 2026
  3. 8 Nov 2026 · 15:16:05 UTC EPSS0.4%; scored 7 Nov 2026 → 0.4%; scored 8 Nov 2026
  4. 7 Nov 2026 · 16:12:44 UTC EPSS0.4%; scored 6 Nov 2026 → 0.4%; scored 7 Nov 2026
  5. 6 Nov 2026 · 19:15:37 UTC EPSS0.4%; scored 5 Nov 2026 → 0.4%; scored 6 Nov 2026
  6. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  7. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  8. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  9. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  10. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  11. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  12. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  13. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  14. 5 Nov 2026 · 23:42:03 UTC EPSS0.4%; scored 4 Nov 2026 → 0.4%; scored 5 Nov 2026
  15. 5 Nov 2026 · 02:36:20 UTC EPSS0.4%; scored 3 Nov 2026 → 0.4%; scored 4 Nov 2026
  16. 4 Nov 2026 · 03:04:37 UTC EPSS0.4%; scored 2 Nov 2026 → 0.4%; scored 3 Nov 2026
  17. 3 Nov 2026 · 01:53:36 UTC EPSS0.4%; scored 1 Nov 2026 → 0.4%; scored 2 Nov 2026
  18. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  19. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  20. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  21. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  22. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  23. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  24. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  25. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  26. 2 Nov 2026 · 00:36:51 UTC EPSS0.4%; scored 31 Oct 2026 → 0.4%; scored 1 Nov 2026
  27. 31 Oct 2026 · 18:22:15 UTC EPSS0.4%; scored 30 Oct 2026 → 0.4%; scored 31 Oct 2026
  28. 30 Oct 2026 · 18:02:45 UTC EPSS0.4%; scored 29 Oct 2026 → 0.4%; scored 30 Oct 2026
  29. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  30. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  31. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  32. 29 Oct 2026 · 18:33:30 UTC EPSS0.4%; scored 28 Oct 2026 → 0.4%; scored 29 Oct 2026
  33. 28 Oct 2026 · 20:00:33 UTC EPSS0.4%; scored 27 Oct 2026 → 0.4%; scored 28 Oct 2026
  34. 27 Oct 2026 · 15:48:13 UTC EPSS0.4%; scored 26 Oct 2026 → 0.4%; scored 27 Oct 2026
  35. 26 Oct 2026 · 23:57:09 UTC EPSS0.4%; scored 25 Oct 2026 → 0.4%; scored 26 Oct 2026
  36. 25 Oct 2026 · 17:12:51 UTC EPSS0.4%; scored 24 Oct 2026 → 0.4%; scored 25 Oct 2026
  37. 25 Oct 2026 · 01:34:18 UTC EPSS0.4%; scored 23 Oct 2026 → 0.4%; scored 24 Oct 2026
  38. 23 Oct 2026 · 15:51:28 UTC EPSS0.4%; scored 22 Oct 2026 → 0.4%; scored 23 Oct 2026
  39. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  40. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  41. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  42. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  43. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  44. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  45. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  46. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  47. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  48. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  49. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  50. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  51. 22 Oct 2026 · 17:33:15 UTC EPSS0.4%; scored 21 Oct 2026 → 0.4%; scored 22 Oct 2026
  52. 21 Oct 2026 · 21:47:24 UTC EPSS0.4%; scored 20 Oct 2026 → 0.4%; scored 21 Oct 2026
  53. 20 Oct 2026 · 20:53:31 UTC EPSS0.4%; scored 19 Oct 2026 → 0.4%; scored 20 Oct 2026
  54. 19 Oct 2026 · 15:12:40 UTC EPSS0.4%; scored 18 Oct 2026 → 0.4%; scored 19 Oct 2026
  55. 18 Oct 2026 · 14:54:30 UTC EPSS0.4%; scored 16 Oct 2026 → 0.4%; scored 18 Oct 2026
  56. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  57. 16 Oct 2026 · 16:13:25 UTC EPSS0.4%; scored 15 Oct 2026 → 0.4%; scored 16 Oct 2026
  58. 15 Oct 2026 · 21:30:54 UTC EPSS0.4%; scored 14 Oct 2026 → 0.4%; scored 15 Oct 2026
  59. 15 Oct 2026 · 01:07:54 UTC EPSS0.4%; scored 13 Oct 2026 → 0.4%; scored 14 Oct 2026
  60. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current

Explore global source statements, affected packages and advisory history for CVE-2026-77903. The catalog has a separate collection scope from Microsoft release records.

More advisories, affected versions and source history

Exploitation and risk

Source status

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

Which CVEs have scores here?

This view includes predictions for CVE identifiers explicitly listed in public NuGet advisories. Microsoft release pages have their own prediction coverage. Check source status for the scope and latest checks.

No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.

Risk history

Compare earlier KEV listings and daily EPSS scores. Advisory wording and affected versions have a separate history.

When does an EPSS score appear as a change?

A prediction change is reported when EPSS rises from below 10% to 10% or higher. Other daily score changes remain in this history.

Advisory history

5 saved versions

See how the publisher's advisory changed over time. Each link opens the version saved at that time. The publisher's update date can differ from the date shown here.

How advisory history works

Each link identifies one complete publisher record. History can include advisories that previously shared an identifier; an identifier removed by a publisher no longer establishes a current relationship. A historical link shows only that record and earlier saved versions. Failed checks and unchanged reads do not create new versions.

10 Nov 2026 23:21:22 UTC

Microsoft Dataverse Elevation of Privilege Vulnerability

cve-program · CVE-2026-77903 · Published

31 Oct 2026 18:04:47 UTC

Microsoft Dataverse Elevation of Privilege Vulnerability

cve-program · CVE-2026-77903 · Published

30 Oct 2026 22:45:26 UTC

Microsoft Dataverse Elevation of Privilege Vulnerability

cve-program · CVE-2026-77903 · Published

27 Oct 2026 02:23:01 UTC

Microsoft Dataverse Elevation of Privilege Vulnerability

cve-program · CVE-2026-77903 · Published

23 Oct 2026 15:48:27 UTC

Microsoft Dataverse Elevation of Privilege Vulnerability

cve-program · CVE-2026-77903 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 12 Nov 15:26 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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