Deserialization of Untrusted Data in Microsoft Dynamics NAV - CVE-2026-55944
Published: July 17, 2026
Vulnerability identifier: #VU138260
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55944
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises). A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Microsoft Dynamics NAV
How to mitigate CVE-2026-55944
Install updates from vendor's website.
Microsoft Dynamics NAV - update to 11.0.50704.0