Patch tracker / KB5002816

KB5002816: Microsoft SharePoint Server 2019 Security Update (December 2025)

KB5002816 is a High security update for Microsoft SharePoint Server 2019, released 2025-12-09. It closes 4 CVEs with a maximum CVSS of 7.8. It is the 41st largest of the 59 updates Microsoft shipped that month, by CVEs closed.

Update summary

High
2025-12-09
Released
4
CVEs fixed
7.8
Max CVSS v3
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 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 KB5002816Microsoft support article
Senserva AI Opinion for KB5002816

KB5002816 is a December 2025 SharePoint and Office patch covering four CVEs across SharePoint Enterprise Server 2016, SharePoint Server 2019, and Office 2019 32-bit, with the worst rated High at CVSS 7.8. On-premises SharePoint farm operators are the exposed group here since this bundles server-side fixes rather than just a client Office update. None of the four CVEs are in the CISA KEV catalog or linked to ransomware, and EPSS tops out at only 1 percent, so this is scheduled hardening rather than an emergency.

Do this: Schedule this on your on-prem SharePoint 2016 and 2019 farms during the next maintenance window and confirm the matching Office 2019 32-bit component is patched on connected workstations.

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

Senserva AI Opinion and rich prompt for KB5002816

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

Full tracking and change history for KB5002816

Released
2025-12-09
Last changed
2026-07-08
Changes tracked
2

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 KB5002816 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-2025-62558High7.8<1%No
CVE-2025-62559High7.8<1%No
CVE-2025-62562High7.8<1%No
CVE-2025-62555High7.0<1%No

Scope and sources

Affected products
Also released in December 2025

KB5066586

98 CVEs · Critical · exploited

KB5066780

114 CVEs · Critical · exploited

KB5066782

103 CVEs · Critical · exploited

KB5066791

98 CVEs · Critical · exploited

KB5066793

108 CVEs · Critical · exploited

KB5066835

134 CVEs · Critical · exploited

KB5068779

32 CVEs · Critical · exploited

KB5068781

33 CVEs · Critical · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002816 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.