Security Updates for Microsoft Dynamics NAV 2018 (Oct 2026)

high Nessus Plugin ID 371211

Synopsis

The Microsoft Dynamics NAV install is missing a security update.

Description

The Microsoft Dynamics NAV 2018 install is missing a security update. It is, therefore, affected by multiple vulnerabilities:

- Deserialization of untrusted data allows an authorized attacker to execute code over a network.
(CVE-2026-100214)

- Improper limitation of a pathname to a restricted directory ('path traversal') allows an authorized attacker to elevate privileges over a network. (CVE-2026-102226)

- Improper authentication allows an unauthorized attacker to disclose information over a network.
(CVE-2026-105728)

Note that Nessus has not attempted to exploit these issues but has instead relied only on the application's self-reported version number.

Solution

Update the Microsoft Dynamics NAV 2018 server to build 50736, or later.

See Also

http://www.nessus.org/u?5d58129d

Plugin Details

Severity: High

ID: 371211

File Name: smb_nt_ms26_oct_microsoft_dynamics_nav_2018.nasl

Version: 1.1

Type: Local

Agent: windows

Published: 10/23/2026

Updated: 10/23/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.41

CVSS v2

Risk Factor: High

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-100214

CVSS v3

Risk Factor: High

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: x-cpe:/a:microsoft:dynamics_nav

Required KB Items: installed_sw/Microsoft Dynamics NAV Server

Patch Publication Date: 10/13/2026

Vulnerability Publication Date: 10/13/2026

Reference Information

CVE: CVE-2026-100214, CVE-2026-102226, CVE-2026-105727, CVE-2026-105728

IAVA: 2026-A-1178

MSFT: MS26-5022710

MSKB: 5022710