Patch tracker / KB5002856

KB5002856: Microsoft SharePoint Server 2019 Security Update (April 2026)

KB5002856 is a Medium security update for Microsoft SharePoint Server 2019, released 2026-04-14. It closes 1 CVE with a maximum CVSS of 4.6. The most likely of them to be attacked is CVE-2026-20945, which FIRST.org rates at 25% probability of exploitation in the next 30 days.

Update summary

Medium
2026-04-14
Released
1
CVEs fixed
4.6
Max CVSS
Medium
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 4.6 (Medium). EPSS exploit probability up to 25%. 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: 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 KB5002856Microsoft support article
Senserva AI Opinion for KB5002856

KB5002856 patches a single vulnerability (CVE-2026-20945) across on-premises SharePoint Enterprise Server 2016, Server 2019, and Subscription Edition. The rating is Medium at CVSS 4.6, but the 25 percent EPSS is unusually high for a Medium item, suggesting exploitation attempts are more plausible than the severity alone implies. Anyone running self-hosted SharePoint farms is exposed; SharePoint Online is not in scope here.

Do this: Schedule KB5002856 across all SharePoint 2016, 2019, and Subscription Edition farm servers, and run the SharePoint Products Configuration Wizard afterward to complete the patch.

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

Senserva AI Opinion and rich prompt for KB5002856

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

Full tracking and change history for KB5002856

Released
2026-04-14
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 KB5002856 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-2026-20945Medium4.625%No

Scope and sources

Affected products
Also released in April 2026

KB5002853

2 CVEs · Medium · exploited

KB5002854

2 CVEs · Medium · exploited

KB5002861

2 CVEs · Medium · exploited

KB5082052

115 CVEs · Critical

KB5082060

121 CVEs · Critical

KB5082063

124 CVEs · Critical

KB5082123

107 CVEs · Critical

KB5082142

116 CVEs · Critical

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002856 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.