CVE-2026-40370

SQL Server Remote Code Execution Vulnerability

CVE-2026-40370 is fixed in 10 products on 1 platform, first by KB5089271, released May 12, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0056

46th percentile

<p>External control of file name or path in SQL Server allows an authorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 (GDR)	KB5089271	May 12, 2026
Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 Azure Connect Feature Pack	KB5089270	May 12, 2026
Microsoft SQL Server 2017 for x64-based Systems (CU 31)	KB5090354	May 12, 2026
Microsoft SQL Server 2017 for x64-based Systems (GDR)	KB5090347	May 12, 2026
Microsoft SQL Server 2019 for x64-based Systems (CU 32)	KB5090407	May 12, 2026
Microsoft SQL Server 2019 for x64-based Systems (GDR)	KB5090408	May 12, 2026
Microsoft SQL Server 2022 for x64-based Systems (CU 24)	KB5089900	May 12, 2026
Microsoft SQL Server 2022 for x64-based Systems (GDR)	KB5091158	May 12, 2026
Microsoft SQL Server 2025 for x64-based Systems (CU4)	KB5089899	May 12, 2026
Microsoft SQL Server 2025 for x64-based Systems (GDR)	KB5091223	May 12, 2026

Details

Published
May 12, 2026
Weakness
External Control of File Name or Path
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40370

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