Weak Authentication in Microsoft Dynamics Business Central
CVE-2026-40417

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Dynamics 365 Business Central 2024 Release Wave 2
Microsoft Dynamics 365 Business Central 2026 Release Wave 1
Microsoft Dynamics 365 Business Central Release Wave 1 2025
Microsoft Dynamics 365 Business Central Release Wave 2 2025
Vendor
CVE Published:
12 May 2026

What is CVE-2026-40417?

A flaw in Microsoft Dynamics Business Central's authentication mechanism allows an attacker with local access to exploit this vulnerability and elevate their privileges. This could lead to unauthorized actions being taken within the system, posing a significant risk to sensitive data and overall system integrity. It is crucial for users to apply the latest patches and updates to mitigate the potential impact of this vulnerability.

Affected Version(s)

Microsoft Dynamics 365 Business Central 2024 Release Wave 2 25.0 < 25.18

Microsoft Dynamics 365 Business Central 2026 Release Wave 1 28.0 < 28.1

Microsoft Dynamics 365 Business Central Release Wave 1 2025 26.0 < 26.12

References

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

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.