Patch tracker / KB5086069
KB5086069: Microsoft Dynamics 365 Business Centra Security Update (May 2026)
KB5086069 is a High security update for Microsoft Dynamics 365 Business Centra, released 2026-05-12. It closes 1 CVE with a maximum CVSS of 7.8. It is the 37th largest of the 61 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 1 CVE. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Microsoft Dynamics 365 Business Central 2026 Release Wave 1 has shipped since this one: KB5100263 (2026-08-11). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
KB5086069 patches a single flaw, CVE-2026-40417, rated High at CVSS 7.8, across three Dynamics 365 Business Central release waves (2025 Wave 1, 2025 Wave 2, and 2026 Wave 1). Exposure is limited to organizations running these Business Central versions, and the exploitation probability is currently at 0 percent EPSS with no CISA KEV or ransomware association. The breadth across three concurrent release waves means many Business Central tenants will need to confirm which wave they are on before applying the fix.
Do this: Identify which Business Central release wave each of your environments runs and apply KB5086069 to any on 2025 Wave 1, 2025 Wave 2, or 2026 Wave 1.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5086069
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5086069
- Released
- 2026-05-12
- Last changed
- 2026-05-12
- Changes tracked
- 1
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Check if KB5086069 is installed
Elevated PowerShell. No output means it is not installed.
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2026-40417 | High | 7.8 | <1% | No |
Scope and sources
- Affected products
- Also released in May 2026
KB5002863
9 CVEs · High · exploitedKB5002868
9 CVEs · High · exploitedKB5002870
9 CVEs · High · exploitedKB5094139
1 CVE · High · exploitedKB5094140
1 CVE · High · exploitedKB5094142
1 CVE · High · exploitedKB5094144
1 CVE · High · exploitedKB5078943
3 CVEs · CriticalThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.