CVE-2026-55944

CRITICAL

Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability

Title source: cna
STIX 2.1

Description

Deserialization of untrusted data in Microsoft Dynamics NAV allows an unauthorized attacker to execute code over a network.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944

Scores

CVSS v3 9.8
EPSS 0.0128
EPSS Percentile 67.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-502
Status published
Products (2)
microsoft/dynamics_nav 2018
Microsoft/Microsoft Dynamics NAV 2018 1.0 - 11.0.50704.0
Published Jul 14, 2026
Tracked Since Jul 14, 2026