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CVE-2023-21705: Microsoft SQL Server Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-14 · updated 2026-08-19
• Weakness: CWE-321

Description

Microsoft SQL Server Remote Code Execution Vulnerability

Affected products

• Microsoft SQL Server: 2012-sp4, 2014-sp3, 2016-sp3, 2017, 2019, 2022
• Microsoft SQL Server 2012 for x64-based Systems Service Pack 4 (QFE): from 11.0.0 before 11.0.7512.11 — fixed in 11.0.7512.11
• Microsoft SQL Server 2012 Service Pack 4 (QFE): from 11.0.0 before 11.0.7512.11 — fixed in 11.0.7512.11
• Microsoft SQL Server 2014 Service Pack 3 (CU 4): from 12.0.0 before 12.0.6174.8 — fixed in 12.0.6174.8
• Microsoft SQL Server 2014 Service Pack 3 (GDR): from 12.0.0 before 12.0.6444.4 — fixed in 12.0.6444.4
• Microsoft SQL Server 2016 Service Pack 3 Azure Connect Feature Pack: from 13.0.0 before 13.0.7024.30 — fixed in 13.0.7024.30
• Microsoft SQL Server 2016 Service Pack 3 (GDR): from 13.0.0 before 13.0.6430.49 — fixed in 13.0.6430.49
• Microsoft SQL Server 2017 (CU 31): from 14.0.0 before 14.0.3460.9 — fixed in 14.0.3460.9
• Microsoft SQL Server 2017 (GDR): from 14.0.0 before 14.0.2047.8 — fixed in 14.0.2047.8
• Microsoft SQL Server 2019 (CU 18): from 15.0.0 before 15.0.4280.7 — fixed in 15.0.4280.7
• Microsoft SQL Server 2019 (GDR): from 15.0.0 before 15.0.2101.7 — fixed in 15.0.2101.7
• Microsoft SQL Server 2022 (GDR): from 16.0.0 before 16.0.1050.5 — fixed in 16.0.1050.5

How to fix

Upgrade to a fixed version: Microsoft SQL Server 2012 for x64-based Systems Service Pack 4 (QFE) 11.0.7512.11; Microsoft SQL Server 2012 Service Pack 4 (QFE) 11.0.7512.11; Microsoft SQL Server 2014 Service Pack 3 (CU 4) 12.0.6174.8; Microsoft SQL Server 2014 Service Pack 3 (GDR) 12.0.6444.4; Microsoft SQL Server 2016 Service Pack 3 Azure Connect Feature Pack 13.0.7024.30; Microsoft SQL Server 2016 Service Pack 3 (GDR) 13.0.6430.49; Microsoft SQL Server 2017 (CU 31) 14.0.3460.9; Microsoft SQL Server 2017 (GDR) 14.0.2047.8; Microsoft SQL Server 2019 (CU 18) 15.0.4280.7; Microsoft SQL Server 2019 (GDR) 15.0.2101.7; Microsoft SQL Server 2022 (GDR) 16.0.1050.5. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21705
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21705

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