What is CVE-2026-54108?

CVE-2026-54108 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under External Control of File Name or Path. CVSS score: 6.5/10. Published 2026-07-14.

How severe is CVE-2026-54108?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Sharepoint Enterprise Server 2016

CVE-2026-54108

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
Microsoft Sharepoint Server 2019 — versions 16.0.0
Microsoft Sharepoint Server Subscription Edition — versions 16.0.0

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-54108?: CVE-2026-54108 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under External Control of File Name or Path. CVSS score: 6.5/10. Published 2026-07-14.
How severe is CVE-2026-54108?: Medium severity. CVSS v3 base score is 6.5 out of 10.