CVE-2026-55944

criticalpriority · track · 11EPSS 0.015 · 75 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.53% (75th) EPSS

CVSS 9.8 · critical

Is it mine?

7 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Dynamics NAV 2018msrc_csaf
11.0.50704.0:Security Update:https://support.microsoft.com/en-US/servicing/dynamics/nav/update/2022/12/cumulative-update-60-for-microsoft-dynamics-nav-2018-build-49618
https://support.microsoft.com/en-US/servicing/dynamics/nav/update/2022/12/cumulative-update-60-for-microsoft-dynamics-nav-2018-build-49618

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 3.9 · impact 5.9

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · NCSC-NL NL

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-502USCWE-502USCWE-502USCWE-502US

exploits (1)

Public proof-of-concept and weaponised exploit code.

kipkorirchirchir800-hash/Cve-2026-55944This PoC simulates an XML parsing vulnerability where configuration data is parsed and passed directly to ProcessStartInfo. It extracts executable paths and arguments from XML markup to spawn a system process, demonstrating how unsafe input handling can lead to arbitrary command execution.PoC · poc_in_github

affected products (7)

Products and version ranges known to be affected.

Microsoft Dynamics NAV 2018all versionscert_bundDEcpe:/a:microsoft:dynamics_nav_2018:-
Microsoft Microsoft Dynamics NAV 20181.0 → 11.0.50704.0enisa_euvdEU
Microsoft Corp Microsoft Dynamics NAV 2018≤ 11.0.50704.0fstec_bduRU
Microsoft Microsoft Dynamics NAV 2018all versionsfixedmsrc_csafUS
Microsoft Microsoft Dynamics NAV 2018< 11.0.50704.0msrc_csafUS
Microsoft Microsoft Dynamics NAV 2018≤ vers:unknown/*ncsc_nlNL
microsoft dynamics nav= 2018nvdUScpe:2.3:a:microsoft:dynamics_nav:*:*:*:*:*:*:*:*

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0238Kwetsbaarheid verholpen in Microsoft DynamicsNL2026-07-14csaf · ncsc_nlNL
Microsoft heeft een kwetsbaarheid verholpen in Dynamics NAV en 365 Business Central.
WID-SEC-W-2026-2325Microsoft Dynamics NAV: Schwachstelle ermöglicht CodeausführungDeutsch2026-07-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft Dynamics NAV ausnutzen, um beliebigen Programmcode auszuführen.
msrc_CVE-2026-55944Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability2026-07-14csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl nvd NVD CVE.org MITRE

published 2026-07-14modified 2026-10-24

references (3)

External citations — patches, advisories, analysis.

scry

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