Patch tracker / KB5047621

KB5047621: Windows Server 2019 Security Update (October 2024)

KB5047621 is a High security update for Windows Server 2019, released 2024-10-08. It closes 3 CVEs with a maximum CVSS of 7.8. The most likely of them to be attacked is CVE-2024-43516, which FIRST.org rates at 82% probability of exploitation in the next 30 days.

Update summary

High
2024-10-08
Released
3
CVEs fixed
7.8
Max CVSS
High
Severity
Deploy this cycle
Fixes 3 CVEs for Windows Server 2019. No confirmed in-the-wild exploitation in this set today.

Fixes 3 CVEs. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%. Among the lower 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 KB5047621Microsoft support article
Senserva AI Opinion for KB5047621

KB5047621 is the October 8, 2024 rollup for Windows 10 version 1809 and Windows Server 2019, fixing three CVEs (CVE-2024-43516, CVE-2024-43528, CVE-2024-43511) with a top rating of High and CVSS 7.8. None are on the CISA KEV list or tied to ransomware, and EPSS peaks at just 1 percent, so exploitation is not currently observed. The catch is that 1809 and Server 2019 are aging builds that often run on legacy application servers where patch cycles slip.

Do this: Deploy KB5047621 to your remaining 1809 and Server 2019 hosts during the next maintenance window and confirm the build version updated afterward.

AI-generated from public data, 2026-07-23. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for KB5047621

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

Full tracking and change history for KB5047621

Released
2024-10-08
Last changed
2024-10-08
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 KB5047621 is installed

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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.

CVESeverityCVSSEPSSExploited
CVE-2024-43516High7.882%No
CVE-2024-43528High7.882%No
CVE-2024-43511High7.082%No

Scope and sources

Affected products
Also released in October 2024

KB29166583

1 CVE · Critical · exploited

KB5044277

77 CVEs · Critical · exploited

KB5044281

65 CVEs · Critical · exploited

KB5044288

83 CVEs · Critical · exploited

KB5044293

56 CVEs · Critical · exploited

KB5044306

32 CVEs · Critical · exploited

KB5044320

32 CVEs · Critical · exploited

KB5044321

36 CVEs · Critical · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5047621 page (Microsoft Support)Microsoft Update CatalogMicrosoft Security Update Guide

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

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
Provided as is, without warranty; verify against the vendor advisory before acting. Data notice and terms.