MSRC-CVE-2026-54108 — Microsoft SharePoint Server Spoofing Vulnerability

Summary

Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

I am running SharePoint Server 2016. Do the updates for SharePoint Enterprise Server 2016 also apply to the version I am running?
Yes. The same KB number applies to both SharePoint Server 2016 and SharePoint Enterprise Server 2016. Customers running either version should install the security update to be protected from this vulnerability.

Security updates
16.0.5561.1001 — https://support.microsoft.com/help/5002891
16.0.10417.20175 — https://support.microsoft.com/help/5002883
16.0.19725.20434 — https://support.microsoft.com/help/5002882

Vulnerabilities 1

Medium 6.5

CVE-2026-54108

Microsoft SharePoint Server Spoofing Vulnerability

External control of file name or path in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

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

Jul 14, 2026

Revision history

2026-07-14 #1
Information published.

References

CVE-2026-54108 Microsoft SharePoint Server Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54108
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss