CVE-2026-40417ImportantRevised 10 Aug
Microsoft Dynamics 365 Business Central Elevation of Privilege Vulnerability
Assessment
Weak authentication in Dynamics Business Central allows an authorized attacker to elevate privileges locally.
- Severity
- Important
- CVSS base score
- 7.8CVSS:3.1/
AV:L/ AC:L/ PR:L/ UI:N/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- 0.3%Higher than 20.2% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Dynamics Business Central
- Weakness
- CWE-1390: Weak Authentication
- Issued by
- Microsoft
- Published
- 12 May 2026 · May 2026
- Last revised
- 10 Aug 2026Updated the build numbers. This is an informational update only.
Updates that fix it
4 KBs| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5086068 | Security Update | — | Microsoft Dynamics 365 Business Central 2024 Release Wave 2 | All CVEs in KB5086068 |
| KB5086069 | Security Update | — | Microsoft Dynamics 365 Business Central Release Wave 1 2025 | All CVEs in KB5086069 |
| KB5086070 | Security Update | — | Microsoft Dynamics 365 Business Central Release Wave 2 2025 | All CVEs in KB5086070 |
| KB5093780 | Security Update | — | Microsoft Dynamics 365 Business Central 2026 Release Wave 1 | All CVEs in KB5093780 |