CVE-2026-65772

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Deserialization Flaw in Microsoft Dynamics 365 Allows Remote Code Execution

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-65772

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	dynamics_365	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

This vulnerability involves deserialization of untrusted data in Microsoft Dynamics 365. An authorized attacker can exploit this to execute arbitrary code over a network.

Impact Analysis

An attacker could gain control over the system, leading to unauthorized access, data theft, or disruption of services. This requires the attacker to have valid credentials.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face legal penalties and reputational damage.

Mitigation Strategies

Apply security updates from Microsoft for Microsoft Dynamics 365 immediately. Restrict network access to Dynamics 365 services to authorized users only. Monitor network traffic for unusual deserialization activity.

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