CVE-2026-54118: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SQL Server 2016 Service Pack 3 (GDR)
CVE-2026-54118 is a high-severity vulnerability in Microsoft SQL Server 2016 Service Pack 3 (GDR) involving deserialization of untrusted data. This flaw allows an authorized attacker with network access and low privileges to execute arbitrary code without user interaction. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability (CWE-502) in Microsoft SQL Server 2016 Service Pack 3 (GDR) arises from improper handling of deserialization of untrusted data. An attacker with authorized access and low privileges can exploit this flaw remotely to execute arbitrary code, impacting confidentiality, integrity, and availability. The CVSS 3.1 base score is 8.8, reflecting high impact and ease of exploitation. Microsoft has published an official fix for this vulnerability as detailed in their security update guide.
Potential Impact
Successful exploitation allows an attacker with authorized network access and low privileges to execute arbitrary code on the affected SQL Server instance. This can lead to full compromise of the database server, including complete loss of confidentiality, integrity, and availability of data and services.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54118 to remediate this vulnerability.
CVE-2026-54118: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SQL Server 2016 Service Pack 3 (GDR)
Description
CVE-2026-54118 is a high-severity vulnerability in Microsoft SQL Server 2016 Service Pack 3 (GDR) involving deserialization of untrusted data. This flaw allows an authorized attacker with network access and low privileges to execute arbitrary code without user interaction. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-502) in Microsoft SQL Server 2016 Service Pack 3 (GDR) arises from improper handling of deserialization of untrusted data. An attacker with authorized access and low privileges can exploit this flaw remotely to execute arbitrary code, impacting confidentiality, integrity, and availability. The CVSS 3.1 base score is 8.8, reflecting high impact and ease of exploitation. Microsoft has published an official fix for this vulnerability as detailed in their security update guide.
Potential Impact
Successful exploitation allows an attacker with authorized network access and low privileges to execute arbitrary code on the affected SQL Server instance. This can lead to full compromise of the database server, including complete loss of confidentiality, integrity, and availability of data and services.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54118 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-11T20:33:37.835Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54118","vendor":"Microsoft"}]
Threat ID: 6a566f7b68715ace43e6baed
Added to database: 07/14/2026, 17:18:51 UTC
Last enriched: 07/15/2026, 01:03:55 UTC
Last updated: 07/15/2026, 01:23:30 UTC
Views: 3
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