# KB5089271: May 2026 security update

KB5089271, released May 12, 2026, fixes 1 CVE in Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 (GDR). None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb5089271
- Platform: Microsoft
- Released: May 12, 2026
- Priority: High (Closes CVE-2026-40370, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5089271

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 (GDR)](https://patchblox.com/security/data/product/microsoft/microsoft-sql-server-2016-for-x64-based-systems-service-pack-3-gdr.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-40370](https://patchblox.com/security/data/cve/CVE-2026-40370.md) | High | SQL Server | 8.8 | 0.0056 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo