What’s Vulnerable › Vulnerabilities

CVE-2026-55944: Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-28
• Weakness: CWE-502

Description

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

Affected products

• Microsoft Dynamics NAV 2018: 2018
• Microsoft Dynamics NAV 2018: from 1.0 before 11.0.50704.0 — fixed in 11.0.50704.0

How to fix

Upgrade to a fixed version: Microsoft Dynamics NAV 2018 11.0.50704.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944

Get alerted when CVE-2026-55944 or the next vulnerability affects your stack