Patch tracker / KB5043076

KB5043076: Windows Server 2019 Security Update (September 2024)

KB5043076 is a High security update for Windows Server 2019, released 2024-09-10. It closes 29 CVEs with a maximum CVSS of 8.8. 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-2024-38240, which FIRST.org rates at 52% probability of exploitation in the next 30 days.

Update summary

HighCISA KEV

2024-09-10

Released

CVEs fixed

8.8

Max CVSS

High

Severity

Deploy now

This update fixes vulnerabilities confirmed exploited in the wild.

Fixes 29 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 52%. 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 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 KB5043076 Microsoft support article

Senserva AI Opinion for KB5043076

KB5043076 matches its sibling's twenty nine CVE count for Windows 10 version 1809 and Windows Server 2019 in September 2024, swapping in CVE-2024-38253 alongside the shared CVE-2024-38240 and CVE-2024-38014 set. High severity, CVSS 8.8, a 52 percent EPSS score, and CISA KEV listing are unchanged from its sibling. The slight difference in included CVEs means both packages together give the fullest coverage.

Do this: Install KB5043076 alongside or in place of its sibling to ensure full September 2024 CVE coverage on Windows 10 1809 and Server 2019.

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

Senserva AI Opinion and rich prompt for KB5043076

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 KB5043076 (source: https://senserva.com/kb/5043076.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- Update: KB5043076, Windows Server 2019, released 2024-09-10
- Severity: High; fixes 29 CVEs, max CVSS 8.8
- Actively exploited (CISA KEV): YES
- CVEs include: CVE-2024-21416, CVE-2024-30073, CVE-2024-38014, CVE-2024-38045, CVE-2024-38046, CVE-2024-38119, CVE-2024-38217, CVE-2024-38234 and 21 more
- Download: https://catalog.update.microsoft.com/Search.aspx?q=KB5043076
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 KB5043076

Released: 2024-09-10
Last changed: 2024-09-10
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 KB5043076 is installed

Elevated PowerShell. No output means it is not installed.

# Is KB5043076 installed? (elevated PowerShell)
Get-HotFix -Id KB5043076 -ErrorAction SilentlyContinue

# Across many machines (replace the names):
Invoke-Command -ComputerName SERVER01,SERVER02 {
  Get-HotFix -Id KB5043076 -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-2024-43461	High	8.8	52%	KEV
CVE-2024-38014	High	7.8	52%	KEV
CVE-2024-38217	Medium	5.4	52%	KEV
CVE-2024-38259	High	8.8	52%	No
CVE-2024-21416	High	8.1	52%	No
CVE-2024-38045	High	8.1	52%	No
CVE-2024-38240	High	8.1	52%	No
CVE-2024-30073	High	7.8	52%	No
CVE-2024-38046	High	7.8	52%	No
CVE-2024-38237	High	7.8	52%	No
CVE-2024-38238	High	7.8	52%	No
CVE-2024-38241	High	7.8	52%	No
CVE-2024-38242	High	7.8	52%	No
CVE-2024-38243	High	7.8	52%	No
CVE-2024-38244	High	7.8	52%	No
CVE-2024-38245	High	7.8	52%	No
CVE-2024-38247	High	7.8	52%	No
CVE-2024-38249	High	7.8	52%	No
CVE-2024-38250	High	7.8	52%	No
CVE-2024-38252	High	7.8	52%	No
CVE-2024-38253	High	7.8	52%	No
CVE-2024-38119	High	7.5	52%	No
CVE-2024-38257	High	7.5	52%	No
CVE-2024-38239	High	7.2	52%	No
CVE-2024-38246	High	7.0	52%	No
CVE-2024-38248	High	7.0	52%	No
CVE-2024-38234	Medium	6.5	52%	No
CVE-2024-38235	Medium	6.5	52%	No
CVE-2024-38254	Medium	5.5	52%	No

Scope and sources

Affected products

Also released in September 2024

Authoritative references

Official KB5043076 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.

KB5043076: Windows Server 2019 Security Update (September 2024)

Update summary

Full tracking and change history for KB5043076

Check if KB5043076 is installed

CVEs fixed by this update

Scope and sources

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