Patch tracker / KB5002850

KB5002850: Microsoft SharePoint Server 2019 Security Update (March 2026)

KB5002850 is a High security update for Microsoft SharePoint Server 2019, released 2026-03-10. It closes 4 CVEs with a maximum CVSS of 8.8. It is the 14th largest of the 38 updates Microsoft shipped that month, by CVEs closed.

Update summary

High
2026-03-10
Released
4
CVEs fixed
8.8
Max CVSS
High
Severity
Deploy this cycle
Fixes 4 CVEs for Microsoft SharePoint Server 2019. No confirmed in-the-wild exploitation in this set today.

Fixes 4 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 3.0%. Among the top 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 KB5002850Microsoft support article
Senserva AI Opinion for KB5002850

KB5002850 patches four CVEs across SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition, with the worst rated High Severity at CVSS 8.8. This affects on-premises SharePoint farm operators, not SharePoint Online tenants. None of the four CVEs are in CISA KEV and EPSS tops out at 2 percent, so exploitation pressure is currently low, but the 8.8 score points to a serious flaw worth patching on a normal cycle.

Do this: Schedule the KB5002850 update across all on-premises SharePoint 2016, 2019, and Subscription Edition farm servers and run the SharePoint Products Configuration Wizard afterward.

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

Senserva AI Opinion and rich prompt for KB5002850

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

Full tracking and change history for KB5002850

Released
2026-03-10
Last changed
2026-07-29
Changes tracked
4

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 KB5002850 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-2026-26105High8.83.0%No
CVE-2026-26106High8.83.0%No
CVE-2026-26113High8.83.0%No
CVE-2026-26114High8.83.0%No

Scope and sources

Affected products
Also released in March 2026

KB5002843

3 CVEs · High

KB5002845

4 CVEs · High

KB5077464

2 CVEs · High

KB5077465

2 CVEs · High

KB5077466

3 CVEs · High

KB5077468

3 CVEs · High

KB5077469

2 CVEs · High

KB5077470

2 CVEs · High

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002850 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.