SB2026101362 - Multiple vulnerabilities in Microsoft Dynamics 365 Business Central

Description

This security bulletin contains information about 2 vulnerabilities.

1) Path traversal (CVE-ID: CVE-2026-105727)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Microsoft Dynamics 365 Business Central. A remote user can send a specially crafted HTTP request and write arbitrary files on the system, leading to privilege escalation.

2) Deserialization of Untrusted Data (CVE-ID: CVE-2026-100214)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in Microsoft Dynamics 365 Business Central. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105727
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100214