# CVE-2026-40417: Microsoft Dynamics 365 Business Central Elevation of Privilege Vulnerability

CVE-2026-40417 is fixed in 4 products on 1 platform, first by KB5086068, released May 12, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-40417
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: May 12, 2026
- Weakness: Weak Authentication
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40417

## Description

<p>Weak authentication in Dynamics Business Central allows an authorized attacker to elevate privileges locally.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Dynamics 365 Business Central 2024 Release Wave 2 |  | [KB5086068](https://patchblox.com/security/data/fix/microsoft/kb5086068.md) | May 12, 2026 |
| Microsoft | Microsoft Dynamics 365 Business Central 2026 Release Wave 1 |  | [KB5093780](https://patchblox.com/security/data/fix/microsoft/kb5093780.md) | May 12, 2026 |
| Microsoft | Microsoft Dynamics 365 Business Central Release Wave 1 2025 |  | [KB5086069](https://patchblox.com/security/data/fix/microsoft/kb5086069.md) | May 12, 2026 |
| Microsoft | Microsoft Dynamics 365 Business Central Release Wave 2 2025 |  | [KB5086070](https://patchblox.com/security/data/fix/microsoft/kb5086070.md) | May 12, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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