Is CVE-2026-54108 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-54108 being exploited in the wild.

How severe is CVE-2026-54108?

Medium severity, with a CVSS score of 6.5, published 14 July 2026.

Which products and versions are affected?

Microsoft SharePoint Enterprise Server 2016 < 16.0.5561.1001; Microsoft SharePoint Server 2019 < 16.0.10417.20175; Microsoft SharePoint Server Subscription Edition < 16.0.19725.20434.

Is there a fix for CVE-2026-54108?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-54108 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-54108?

Check whether you run Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 or Microsoft SharePoint Server Subscription Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-54108: Microsoft SharePoint spoofing via external control of file path

Q: Is there a fix for CVE-2026-54108?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-54108 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-54108?

Check whether you run Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 or Microsoft SharePoint Server Subscription Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-54108 · Severity: medium · CVSS 6.5 · Published 2026-07-14

Microsoft SharePoint is a widely used collaboration and document management platform for businesses. A vulnerability has been identified that allows an authorized user to manipulate file paths, potentially leading to spoofing or unauthorized access to sensitive information. This could allow an internal attacker to misrepresent data or gain access to files they are not intended to see, impacting the integrity and confidentiality of corporate data.

Technologies: Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition. Vendors: Microsoft.

Quick answers

Is CVE-2026-54108 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-54108 being exploited in the wild.
How severe is CVE-2026-54108?: Medium severity, with a CVSS score of 6.5, published 14 July 2026.
Which products and versions are affected?: Microsoft SharePoint Enterprise Server 2016 < 16.0.5561.1001; Microsoft SharePoint Server 2019 < 16.0.10417.20175; Microsoft SharePoint Server Subscription Edition < 16.0.19725.20434.
Is there a fix for CVE-2026-54108?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-54108 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-54108?: Check whether you run Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 or Microsoft SharePoint Server Subscription Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability exists in Microsoft SharePoint (Enterprise Server 2016, Server 2019, and Subscription Edition) due to improper validation of user-supplied input used in file names or paths (CWE-73). An authenticated attacker with low privileges can exploit this over a network by providing specially crafted input to the server. Successful exploitation allows the attacker to perform spoofing or potentially access unauthorized files, leading to a high impact on confidentiality. The vulnerability is addressed in the July 2026 security updates for the affected SharePoint versions.

Affected products

Microsoft SharePoint Enterprise Server 2016 < 16.0.5561.1001
Microsoft SharePoint Server 2019 < 16.0.10417.20175
Microsoft SharePoint Server Subscription Edition < 16.0.19725.20434

Timeline

2026-07-14: disclosed
2026-07-14: advisory

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54108

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