Microsoft Security Response CenterCVE-2026-48560

Microsoft SharePoint Server Spoofing Vulnerability

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Read the vendor bulletin Get alerts for Microsoft SharePoint Enterprise Server

5.4CVSS 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

16.0.5556.1005
16.0.10417.20153
16.0.19725.20384

Next step

What the vendor recommends

Install KB5002880. Install KB5002874. Install KB5002873.

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Jun 9, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 28, 2026 at 11:20 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-48560View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-48560
Last source check: Sep 28, 2026 at 11:20 AM UTC

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Your environment

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What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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