Patch tracker / KB5065430

KB5065430: Windows Server 2019 Security Update (September 2025)

KB5065430 is a High security update for Windows Server 2019, released 2025-09-09. It closes 30 CVEs with a maximum CVSS of 8.8. The most likely of them to be attacked is CVE-2025-54099, which FIRST.org rates at 20% probability of exploitation in the next 30 days.

Update summary

High

2025-09-09

Released

CVEs fixed

8.8

Max CVSS

High

Severity

Deploy this cycle

Fixes 30 CVEs for Windows Server 2019. No confirmed in-the-wild exploitation in this set today.

Fixes 30 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 20%. Among the top half of tracked Microsoft updates by EPSS exploit probability.

Senserva found thiswe track every release for this product line, so we can tell you this package is behind

A newer security update for Windows 10 Version 1809 for 32-bit Systems has shipped since this one: KB5094041 (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.

Microsoft Update Catalog: download KB5065430 Microsoft support article

Senserva AI Opinion for KB5065430

KB5065430 is the September 9, 2025 rollup for Windows 10 Version 1809 and Windows Server 2019, bundling fixes for 30 CVEs with a top rating of High (CVSS 8.8). None are in the CISA KEV catalog and the highest EPSS is 19%, so there is no confirmed active exploitation yet, but the concentration of 30 flaws in a single update is what makes this worth prioritizing. Server 2019 fleets and any remaining 1809 endpoints are the exposed population.

Do this: Approve and deploy KB5065430 to your Windows Server 2019 and 1809 systems through your normal ring-based patch process this cycle.

AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for KB5065430

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 KB5065430 (source: https://senserva.com/kb/5065430.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- Update: KB5065430, Windows Server 2019, released 2025-09-09
- Severity: High; fixes 30 CVEs, max CVSS 8.8
- Actively exploited (CISA KEV): no
- CVEs include: CVE-2025-53799, CVE-2025-53801, CVE-2025-53803, CVE-2025-53804, CVE-2025-53808, CVE-2025-53810, CVE-2025-54091, CVE-2025-54093 and 22 more
- Download: https://catalog.update.microsoft.com/Search.aspx?q=KB5065430
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 KB5065430

Released: 2025-09-09
Last changed: 2026-08-10
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 KB5065430 is installed

Elevated PowerShell. No output means it is not installed.

# Is KB5065430 installed? (elevated PowerShell)
Get-HotFix -Id KB5065430 -ErrorAction SilentlyContinue

# Across many machines (replace the names):
Invoke-Command -ComputerName SERVER01,SERVER02 {
  Get-HotFix -Id KB5065430 -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-2025-54107	High	8.8	20%	No
CVE-2025-54110	High	8.8	20%	No
CVE-2025-54917	High	8.8	20%	No
CVE-2025-54918	High	8.8	20%	No
CVE-2025-55234	High	8.8	20%	No
CVE-2025-53801	High	7.8	20%	No
CVE-2025-54091	High	7.8	20%	No
CVE-2025-54098	High	7.8	20%	No
CVE-2025-54111	High	7.8	20%	No
CVE-2025-54894	High	7.8	20%	No
CVE-2025-54895	High	7.8	20%	No
CVE-2025-54912	High	7.8	20%	No
CVE-2025-54913	High	7.8	20%	No
CVE-2025-54916	High	7.8	20%	No
CVE-2025-54116	High	7.3	20%	No
CVE-2025-54911	High	7.3	20%	No
CVE-2025-54093	High	7.0	20%	No
CVE-2025-54099	High	7.0	20%	No
CVE-2025-54112	High	7.0	20%	No
CVE-2025-53808	Medium	6.7	20%	No
CVE-2025-53810	Medium	6.7	20%	No
CVE-2025-54094	Medium	6.7	20%	No
CVE-2025-54104	Medium	6.7	20%	No
CVE-2025-54109	Medium	6.7	20%	No
CVE-2025-54915	Medium	6.7	20%	No
CVE-2025-55226	Medium	6.7	20%	No
CVE-2025-53799	Medium	5.5	20%	No
CVE-2025-53803	Medium	5.5	20%	No
CVE-2025-53804	Medium	5.5	20%	No
CVE-2025-54101	Medium	4.8	20%	No

Scope and sources

Affected products

Also released in September 2025

Authoritative references

Official KB5065430 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.

KB5065430: Windows Server 2019 Security Update (September 2025)

Update summary

Full tracking and change history for KB5065430

Check if KB5065430 is installed

CVEs fixed by this update

Scope and sources

KB5002775

KB5002778

KB5002784

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KB5065223

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