Patch tracker / KB5002576

KB5002576: Microsoft SharePoint Server 2019 Security Update (September 2025)

KB5002576 is a High security update for Microsoft SharePoint Server 2019, released 2025-09-09. It closes 1 CVE with a maximum CVSS of 7.8. The most likely of them to be attacked is CVE-2025-54906, which FIRST.org rates at 19% probability of exploitation in the next 30 days.

Update summary

High
2025-09-09
Released
1
CVEs fixed
7.8
Max CVSS
High
Severity
Deploy this cycle
Fixes 1 CVE for Microsoft SharePoint Server 2019. No confirmed in-the-wild exploitation in this set today.

Fixes 1 CVE. 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 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 KB5002576Microsoft support article
Senserva AI Opinion for KB5002576

KB5002576 patches CVE-2025-54906, a High severity flaw (CVSS 7.8) affecting SharePoint Enterprise Server 2016, SharePoint Server 2019, and Office 2019 32-bit editions. On-premises SharePoint servers are exposed here, which matters because they are internet-facing collaboration platforms that attackers actively probe. The EPSS is only 1 percent and there is no CISA KEV or ransomware linkage yet, so this is a scheduled hardening job rather than an emergency.

Do this: Schedule this update across your on-premises SharePoint 2016 and 2019 farms and Office 2019 32-bit installs, testing on a staging farm first to catch any post-patch service disruption.

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

Senserva AI Opinion and rich prompt for KB5002576

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

Full tracking and change history for KB5002576

Released
2025-09-09
Last changed
2025-09-09
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 KB5002576 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-2025-54906High7.819%No

Scope and sources

Affected products
Also released in September 2025

KB5002775

3 CVEs · High

KB5002778

3 CVEs · High

KB5002784

1 CVE · High

KB5065220

2 CVEs · High

KB5065221

2 CVEs · High

KB5065222

3 CVEs · High

KB5065223

3 CVEs · High

KB5065224

3 CVEs · High

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002576 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.