CVE-2026-40375: Microsoft Dynamics Business Central Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Aug

Released

2026-08-11

Description

Missing authorization in Dynamics Business Central allows an authorized attacker to disclose information over a network.

FAQ

What type of information could be disclosed by this vulnerability? Exploiting this vulnerability could allow the disclosure of credentials. What action should customers using Microsoft Dynamics 365 Business Central 2024 Release Wave 2 (version 25.x) take? Version 25.x has reached the end of support and will not receive a security update for this vulnerability. Customers should upgrade to version 26.14 or later; see the Dynamics 365 Business Central on-premises lifecycle policy and KB 5100263 for more information.

Affected Products (4)

Microsoft Dynamics

• Microsoft Dynamics 365 Business Central 2024 Release Wave 2
• Microsoft Dynamics 365 Business Central Release Wave 1 2025
• Microsoft Dynamics 365 Business Central 2026 Release Wave 1
• Microsoft Dynamics 365 Business Central Release Wave 2 2025

Security Updates (3)

• 5100263
• 5100266
• 5100265

Acknowledgments

<a href="https://www.linkedin.com/in/nhienit/">nhienit</a> with <a href="https://galaxy.one/">Galaxy One</a>

Revision History

• 2026-08-11: Information published.