---
id: CVE-2026-40371
title: Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability
summary: >-
  Improper handling of insufficient permissions or privileges in Microsoft
  Dynamics 365 (on-premises) allows an authorized attacker to elevate privileges
  over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-280
vendor: Microsoft
product: Microsoft Dynamics 365 (on-premises) version 9.1
affected:
  - dynamics_365_on-premises_version_9.1 >= 9.0 < 9.1.0045.0011
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-06-10T03:56:01.123628Z'
published: '2026-06-09'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:44:16.426Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-40371'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40371'
    label: Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability
tags:
  - cve.org
epss: 0.00778
epssPercentile: 0.53922
ingestedAt: '2026-09-24T14:44:21.405Z'
---

## Overview

Improper handling of insufficient permissions or privileges in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to elevate privileges over a network.

## Affected

- `dynamics_365_on-premises_version_9.1 >= 9.0 < 9.1.0045.0011`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.