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) affects Microsoft Dynamics NAV 2018 and is classified under CWE-502: Deserialization of Untrusted Data. It enables remote code execution by processing maliciously crafted serialized data. The CVSS 3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and complete compromise of confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely without authentication, potentially leading to full system compromise including data theft, modification, or service disruption.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944 to remediate this vulnerability.
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) affects Microsoft Dynamics NAV 2018 and is classified under CWE-502: Deserialization of Untrusted Data. It enables remote code execution by processing maliciously crafted serialized data. The CVSS 3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and complete compromise of confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely without authentication, potentially leading to full system compromise including data theft, modification, or service disruption.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944 to remediate this vulnerability.
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: 08/13/2026, 15:43:44 UTC
Last updated: 08/28/2026, 19:39:45 UTC
Views: 194
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