Patch tracker / KB5044321

KB5044321: Windows Server 2019 Security Update (October 2024)

KB5044321 is a Critical security update for Windows Server 2019, released 2024-10-08. It closes 36 CVEs with a maximum CVSS of 9.0. At least one of them is actively exploited (CISA KEV), so this is a deploy-first update. The most likely of them to be attacked is CVE-2024-38261, which FIRST.org rates at 67% probability of exploitation in the next 30 days.

Update summary

CriticalCISA KEV

2024-10-08

Released

CVEs fixed

9.0

Max CVSS

Critical

Severity

Deploy now

This update fixes vulnerabilities confirmed exploited in the wild.

Fixes 36 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.0 (Critical). EPSS exploit probability up to 67%. Among the top 25% 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 Server 2019 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 KB5044321 Microsoft support article

Senserva AI Opinion for KB5044321

KB5044321 mirrors KB5044356's thirty six CVE set for October 2024 on Windows Server 2019 and Windows Server 2022, including CVE-2024-38149, CVE-2024-43607, and CVE-2024-43608. Critical severity, CVSS 9.0, a 61 percent EPSS score, and CISA KEV listing carry over unchanged from its sibling package. Whichever of these two nearly identical updates a server received, the coverage and the active exploitation risk are the same.

Do this: Confirm KB5044321 or its sibling is applied to close October 2024's server side gaps.

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

Senserva AI Opinion and rich prompt for KB5044321

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 KB5044321 (source: https://senserva.com/kb/5044321.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- Update: KB5044321, Windows Server 2019, released 2024-10-08
- Severity: Critical; fixes 36 CVEs, max CVSS 9.0
- Actively exploited (CISA KEV): YES
- CVEs include: CVE-2024-38124, CVE-2024-38149, CVE-2024-38212, CVE-2024-38261, CVE-2024-38262, CVE-2024-38265, CVE-2024-43453, CVE-2024-43456 and 28 more
- Download: https://catalog.update.microsoft.com/Search.aspx?q=KB5044321
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 KB5044321

Released: 2024-10-08
Last changed: 2026-07-16
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 KB5044321 is installed

Elevated PowerShell. No output means it is not installed.

# Is KB5044321 installed? (elevated PowerShell)
Get-HotFix -Id KB5044321 -ErrorAction SilentlyContinue

# Across many machines (replace the names):
Invoke-Command -ComputerName SERVER01,SERVER02 {
  Get-HotFix -Id KB5044321 -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-2024-43572	High	7.8	67%	KEV
CVE-2024-38124	Critical	9.0	67%	No
CVE-2024-38212	High	8.8	67%	No
CVE-2024-38265	High	8.8	67%	No
CVE-2024-43453	High	8.8	67%	No
CVE-2024-43517	High	8.8	67%	No
CVE-2024-43518	High	8.8	67%	No
CVE-2024-43519	High	8.8	67%	No
CVE-2024-43532	High	8.8	67%	No
CVE-2024-43549	High	8.8	67%	No
CVE-2024-43564	High	8.8	67%	No
CVE-2024-43589	High	8.8	67%	No
CVE-2024-43592	High	8.8	67%	No
CVE-2024-43593	High	8.8	67%	No
CVE-2024-43599	High	8.8	67%	No
CVE-2024-43607	High	8.8	67%	No
CVE-2024-43608	High	8.8	67%	No
CVE-2024-43611	High	8.8	67%	No
CVE-2024-38261	High	7.8	67%	No
CVE-2024-43501	High	7.8	67%	No
CVE-2024-43509	High	7.8	67%	No
CVE-2024-43556	High	7.8	67%	No
CVE-2024-38149	High	7.5	67%	No
CVE-2024-38262	High	7.5	67%	No
CVE-2024-43506	High	7.5	67%	No
CVE-2024-43515	High	7.5	67%	No
CVE-2024-43541	High	7.5	67%	No
CVE-2024-43544	High	7.5	67%	No
CVE-2024-43545	High	7.5	67%	No
CVE-2024-43553	High	7.4	67%	No
CVE-2024-43535	High	7.0	67%	No
CVE-2024-43534	Medium	6.5	67%	No
CVE-2024-43547	Medium	6.5	67%	No
CVE-2024-43570	Medium	6.4	67%	No
CVE-2024-43520	Medium	5.0	67%	No
CVE-2024-43456	Medium	4.8	67%	No

Scope and sources

Affected products

Also released in October 2024

Authoritative references

Official KB5044321 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.

KB5044321: Windows Server 2019 Security Update (October 2024)

Update summary

Full tracking and change history for KB5044321

Check if KB5044321 is installed

CVEs fixed by this update

Scope and sources

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