CVE-2026-55944: Microsoft Dynamics Nav

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Dynamics Nav: version 2018 only

Published 2026-07-14. Last modified 2026-07-22.