Deserialization Vulnerability in Microsoft Dynamics 365 by Microsoft
CVE-2026-65815

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Dynamics 365 (on-premises) Version 9.1
Vendor
CVE Published:
11 August 2026

What is CVE-2026-65815?

A deserialization vulnerability in Microsoft Dynamics 365 (on-premises) can be exploited by authorized attackers to execute arbitrary code over a network. This weakness highlights the importance of rigorous input validation and secure coding practices to prevent untrusted data from being processed, which can lead to unauthorized access and control over the affected application.

Affected Version(s)

Microsoft Dynamics 365 (on-premises) version 9.1 9.0 < 9.1.0047.0006

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.