---
id: CVE-2026-65772
title: >-
  Deserialization of untrusted data in Microsoft Dynamics 365 allows an
  authorized attacker to execute code over a network.
summary: >-
  Deserialization of untrusted data in Microsoft Dynamics 365 allows an
  authorized attacker to execute code 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'
cwe:
  - CWE-502
vendor: Microsoft
product: Microsoft Dynamics 365 (on-premises) version 9.1
affected:
  - dynamics_365_on-premises_version_9.1 >= 9.0 < 9.1.0046.0006
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T17:17:25.597'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65772'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65772'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T16:19:43.282520Z'
epss: 0.00925
epssPercentile: 0.58951
ingestedAt: '2026-09-08T19:08:49.604Z'
---

## Overview

Deserialization of untrusted data in Microsoft Dynamics 365 allows an authorized attacker to execute code over a network.

## Remediation

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