Patch tracker / KB5002639

KB5002639: Microsoft SharePoint Server 2019 Security Update (September 2024)

KB5002639 is a High security update for Microsoft SharePoint Server 2019, released 2024-09-10. It closes 5 CVEs with a maximum CVSS of 8.8. The most likely of them to be attacked is CVE-2024-38018, which FIRST.org rates at 51% probability of exploitation in the next 30 days.

Update summary

High
2024-09-10
Released
5
CVEs fixed
8.8
Max CVSS v3
High
Severity
Deploy this cycle
Fixes 5 CVEs for Microsoft SharePoint Server 2019. No confirmed in-the-wild exploitation in this set today.

Fixes 5 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 51%. 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 Microsoft SharePoint Enterprise Server 2016 has shipped since this one: KB5002882 (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 KB5002639Microsoft support article
Senserva AI Opinion for KB5002639

KB5002639 is one of three parallel September 2024 SharePoint packages addressing the same five CVEs at 8.8 High Severity, with a 51 percent EPSS score indicating meaningful exploitation likelihood even without a CISA KEV entry. SharePoint farms often run multiple language packs or server roles, which is why Microsoft ships several related KBs for one fix set, confirm this specific number matches your farm's components.

Do this: Verify KB5002639 matches your SharePoint farm's server role or language pack and install it.

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

Senserva AI Opinion and rich prompt for KB5002639

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

Full tracking and change history for KB5002639

Released
2024-09-10
Last changed
2026-07-29
Changes tracked
3

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 KB5002639 is installed

Elevated PowerShell. No output means it is not installed.

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-2024-38018High8.851%No
CVE-2024-38227High7.251%No
CVE-2024-38228High7.251%No
CVE-2024-43464High7.251%No
CVE-2024-43466Medium6.551%No

Scope and sources

Affected products
Also released in September 2024

KB5043083

24 CVEs · Critical · exploited

KB5042880

37 CVEs · High · exploited

KB5042881

37 CVEs · High · exploited

KB5043049

2 CVEs · High · exploited

KB5043050

36 CVEs · High · exploited

KB5043051

37 CVEs · High · exploited

KB5043055

37 CVEs · High · exploited

KB5043064

29 CVEs · High · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002639 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.