CVE-2026-47641: Microsoft SharePoint Server Spoofing Vulnerability

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-09 · updated 2026-09-24
Weakness: CWE-20

Description

Improper input validation in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected products

Microsoft SharePoint Server: before 16.0.19725.20384; 2016, 2019 — fixed in 16.0.19725.20384
Microsoft SharePoint Server Subscription Edition: from 16.0.0 before 16.0.19725.20384 — fixed in 16.0.19725.20384
Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before 16.0.5556.1005 — fixed in 16.0.5556.1005
Microsoft SharePoint Server: from 16.0.0 before 16.0.10417.20153 — fixed in 16.0.10417.20153

How to fix

Upgrade to a fixed version: Microsoft SharePoint Server 16.0.19725.20384; Microsoft SharePoint Server Subscription Edition 16.0.19725.20384; Microsoft Sharepoint Enterprise Server 2016 16.0.5556.1005; Microsoft SharePoint Server 16.0.10417.20153. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47641

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