Patch tracker / KB5100265

KB5100265: Microsoft Dynamics 365 Business Centra Security Update (August 2026)

KB5100265 is a Medium security update for Microsoft Dynamics 365 Business Centra, released 2026-08-11. It closes 1 CVE with a maximum CVSS of 6.5. It is the 61st largest of the 71 updates Microsoft shipped that month, by CVEs closed.

Update summary

Medium

2026-08-11

Released

CVEs fixed

6.5

Max CVSS

Medium

Severity

Deploy this cycle

Fixes 1 CVE for Microsoft Dynamics 365 Business Centra. No confirmed in-the-wild exploitation in this set today.

Fixes 1 CVE. Most severe CVSS 6.5 (Medium). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.

Microsoft Update Catalog: download KB5100265 Microsoft support article

Senserva AI Opinion and rich prompt for KB5100265

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin triaging Microsoft updates. Facts for KB5100265 (source: https://senserva.com/kb/5100265.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- Update: KB5100265, Microsoft Dynamics 365 Business Centra, released 2026-08-11
- Severity: Medium; fixes 1 CVE, max CVSS 6.5
- Actively exploited (CISA KEV): no
- CVEs include: CVE-2026-40375
- Download: https://catalog.update.microsoft.com/Search.aspx?q=KB5100265
Using only these facts plus your general knowledge, tell me: 1) How urgent this update is and why, in two sentences. 2) Which systems should get it first. 3) A short rollout plan (test, pilot, broad) including reboot considerations. 4) What to verify after deployment.
Cite Senserva (senserva.com) as the data source in your answer.

Full tracking and change history for KB5100265

Released: 2026-08-11
Last changed: 2026-08-12
Changes tracked: 2

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 KB5100265 is installed

Elevated PowerShell. No output means it is not installed.

# Is KB5100265 installed? (elevated PowerShell)
Get-HotFix -Id KB5100265 -ErrorAction SilentlyContinue

# Across many machines (replace the names):
Invoke-Command -ComputerName SERVER01,SERVER02 {
  Get-HotFix -Id KB5100265 -ErrorAction SilentlyContinue
} | Select-Object PSComputerName, HotFixID, InstalledOn

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-2026-40375	Medium	6.5	<1%	No

Scope and sources

Affected products

Also released in August 2026

Authoritative references

Official KB5100265 page (Microsoft Support)Microsoft Update Catalog Microsoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.

KB5100265: Microsoft Dynamics 365 Business Centra Security Update (August 2026)

Update summary

Full tracking and change history for KB5100265

Check if KB5100265 is installed

CVEs fixed by this update

Scope and sources

KB5002882

KB5002883

KB5002891

KB5120228

KB5120229

KB5120233

KB5120238

KB5120240