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Microsoft Security Response CenterCVE-2026-63512

Microsoft SharePoint Server Tampering Vulnerability

Incorrect authorization in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.

Read the vendor bulletin Get alerts for Microsoft SharePoint Enterprise Server
6.5CVSS out of 10High severity
Scope

What the vendor says is affected

  • Microsoft SharePoint Enterprise Server 2016
  • Microsoft SharePoint Server 2019
  • Microsoft SharePoint Server Subscription Edition

Versions the vendor lists as fixed

  • 16.0.5565.1001
  • 16.0.10417.20198
  • 16.0.19725.20522
Next step

What the vendor recommends

Install KB5002905. Install KB5002906. Install KB5002894. Install KB5002896. Install KB5002893.

Review the complete instructions on the vendor's site
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed its remediation guidance.
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-63512View CVSS, KEV, EPSS, and threat context
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