CVE-2026-55944: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft Dynamics NAV 2018
Deserialization of untrusted data in Microsoft Dynamics NAV allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-55944) in Microsoft Dynamics NAV 2018 is caused by unsafe deserialization of untrusted data, classified under CWE-502. Exploitation enables remote code execution by an unauthenticated attacker over the network. The CVSS v3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely without authentication, potentially leading to full system compromise including complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Apply the official security update provided by Microsoft for Microsoft Dynamics NAV 2018 as detailed in the vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944). This patch addresses the deserialization vulnerability and mitigates the risk of remote code execution. No additional mitigation steps are specified by the vendor.
CVE-2026-55944: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft Dynamics NAV 2018
Description
Deserialization of untrusted data in Microsoft Dynamics NAV allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-55944) in Microsoft Dynamics NAV 2018 is caused by unsafe deserialization of untrusted data, classified under CWE-502. Exploitation enables remote code execution by an unauthenticated attacker over the network. The CVSS v3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely without authentication, potentially leading to full system compromise including complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Apply the official security update provided by Microsoft for Microsoft Dynamics NAV 2018 as detailed in the vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944). This patch addresses the deserialization vulnerability and mitigates the risk of remote code execution. No additional mitigation steps are specified by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-17T17:37:17.983Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944","vendor":"Microsoft"}]
Threat ID: 6a5676b868715ace43f0abab
Added to database: 07/14/2026, 17:49:44 UTC
Last enriched: 07/14/2026, 19:03:08 UTC
Last updated: 07/15/2026, 02:40:30 UTC
Views: 7
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