# CVE-2026-105728: Microsoft Dynamics Business Central authentication bypass

Source: https://junglewise.ai/threats/cve-2026-105728-improper-authentication-in-dynamics-business-central-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-105728 · Severity: high · CVSS 7.5 · Published 2026-10-13

Dynamics Business Central, a cloud-based business management platform used by organizations to manage finances and operations, contains an authentication flaw that allows an attacker to bypass login controls. An attacker exploiting this vulnerability could access sensitive business data without valid credentials, potentially exposing financial records, customer information, and operational details.

Technologies: [Microsoft Dynamics Business Central](https://junglewise.ai/threats/technologies/dynamics-business-central). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-105728 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105728 being exploited in the wild.

**How severe is CVE-2026-105728?** High severity, with a CVSS score of 7.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Dynamics Business Central.

**Is there a fix for CVE-2026-105728?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-105728 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-105728?** Check whether you run Microsoft Dynamics Business Central. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Improper authentication validation in Dynamics Business Central enables an unauthenticated attacker to disclose information over the network. The vulnerability requires only network access with no user interaction or elevated privileges, allowing remote information disclosure through authentication bypass.

## Affected products

- Microsoft Dynamics Business Central

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105728](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105728)

## Related threats

- [Microsoft Dynamics Business Central path traversal privilege escalation](https://junglewise.ai/threats/cve-2026-105727-improper-limitation-of-a-pathname-to-a-restricted-directory-path)
- [Microsoft Dynamics Business Central path traversal privilege escalation](https://junglewise.ai/threats/cve-2026-102226-improper-limitation-of-a-pathname-to-a-restricted-directory-path)
- [Microsoft Dynamics Business Central deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-100214-deserialization-of-untrusted-data-in-dynamics-business-central)