HIGH 8.8 Microsoft
CVE-2026-66814
Microsoft SQL Server Elevation of Privilege Vulnerability
Microsoft Security Update 2026-Sep: Microsoft SQL Server Elevation of Privilege Vulnerability
Affected Products
- Microsoft SQL Server 2017 for x64-based Systems (GDR)
- Microsoft SQL Server 2019 for x64-based Systems (GDR)
- Microsoft SQL Server 2017 for x64-based Systems (CU 31)
- Microsoft SQL Server 2022 for x64-based Systems (GDR)
- Microsoft SQL Server 2025 for x64-based Systems (GDR)
- Microsoft SQL Server 2019 for x64-based Systems (CU 32)
- Microsoft SQL Server 2025 for x64-based Systems (CU8)
- Microsoft SQL Server 2022 for x64-based Systems (CU 26)
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66814
- https://nvd.nist.gov/vuln/detail/CVE-2026-66814
This high severity vulnerability with a CVSS score of 8.8 was published on 2026-09-08 via Microsoft. Affected: Microsoft SQL Server 2017 for x64-based Systems (GDR), Microsoft SQL Server 2019 for x64-based Systems (GDR), Microsoft SQL Server 2017 for x64-based Systems (CU 31) and 5 more.
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