# KB5086070: May 2026 security update

KB5086070, released May 12, 2026, fixes 1 CVE in Microsoft Dynamics 365 Business Central Release Wave 2 2025. 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/kb5086070
- Platform: Microsoft
- Released: May 12, 2026
- Priority: High (Closes CVE-2026-40417, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5086070

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Dynamics 365 Business Central Release Wave 2 2025](https://patchblox.com/security/data/product/microsoft/microsoft-dynamics-365-business-central-release-wave-2-2025.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-40417](https://patchblox.com/security/data/cve/CVE-2026-40417.md) | High | Dynamics Business Central | 7.8 | 0.0027 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo