CVE-2026-20951

Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2026-20951 is fixed in 3 products on 1 platform, first by KB5002828, released January 13, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0079

56th percentile

<p>Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SharePoint Enterprise Server 2016	KB5002828	Jan 13, 2026
Microsoft SharePoint Server 2019	KB5002825	Jan 13, 2026
Microsoft SharePoint Server Subscription Edition	KB5002822	Jan 13, 2026

Details

Published
January 13, 2026
Weakness
Improper Input Validation
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20951

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-20951">CVE-2026-20951 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.