Patch tracker / KB5002851

KB5002851: Microsoft SharePoint Server 2019 Security Update (March 2026)

KB5002851 is a High security update for Microsoft SharePoint Server 2019, released 2026-03-10. It closes 1 CVE with a maximum CVSS of 8.4. It is the 32nd largest of the 38 updates Microsoft shipped that month, by CVEs closed.

Update summary

High
2026-03-10
Released
1
CVEs fixed
8.4
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 8.4 (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: KB5002873 (2026-07-14). 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 KB5002851Microsoft support article
Senserva AI Opinion for KB5002851

KB5002851 patches CVE-2026-26113, a single High severity flaw (CVSS 8.4) affecting on-premises SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition. Exploitation prediction is currently low (1% EPSS) with no CISA KEV or ransomware association, but SharePoint servers are internet-facing collaboration hubs that attract attackers once proof-of-concept code appears. The 8.4 rating means this warrants prompt attention rather than a routine cycle.

Do this: Apply KB5002851 to all on-premises SharePoint 2016, 2019, and Subscription Edition farms, running any required post-patch configuration steps on each server.

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

Senserva AI Opinion and rich prompt for KB5002851

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

Full tracking and change history for KB5002851

Released
2026-03-10
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 KB5002851 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-2026-26113High8.83.0%No

Scope and sources

Affected products
Also released in March 2026

KB5002843

3 CVEs · High

KB5002845

4 CVEs · High

KB5002850

4 CVEs · High

KB5077464

2 CVEs · High

KB5077465

2 CVEs · High

KB5077466

3 CVEs · High

KB5077468

3 CVEs · High

KB5077469

2 CVEs · High

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002851 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.