All vulnerabilities
CVE-2026-55944

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

Microsoft Microsoft Dynamics NAV 2018
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)1.53%Chance of exploitation activity in the next 30 days, higher than 74% of CVEs. Scored 26 Oct 2026FIRST EPSS
Fixed in11.0.50704.0Fixed versionCVE List
Published14 Jul 2026Updated 8 Oct 2026CVE List

What fixes it

  • 11.0.50704.0Microsoft Dynamics NAV 2018CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 14 Jul 2026, 17:09 UTCPublishedCVE List
  2. 27 Oct 2026, 02:34 UTCExploit code publicGitHub proof-of-concept repositories

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

Description

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

Text from CVE List

Affected versions 1

  • Microsoft Dynamics NAV 2018affected: 1.0 before 11.0.50704.0CVE List

References 1