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

The Microsoft SharePoint Server 2016 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute     code over a network. (CVE-2026-50522)

  - External control of file name or path in Microsoft Office SharePoint allows an authorized attacker to     perform spoofing over a network. (CVE-2026-54108)

  - Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office     SharePoint allows an authorized attacker to perform spoofing over a network. (CVE-2026-55016)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft SharePoint Server 2019 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute     code over a network. (CVE-2026-50522)

  - External control of file name or path in Microsoft Office SharePoint allows an authorized attacker to perform     spoofing over a network. (CVE-2026-54108)

  - Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office     SharePoint allows an authorized attacker to perform spoofing over a network. (CVE-2026-55016)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft SharePoint Server Subscription Edition installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute     code over a network. (CVE-2026-50522)

  - External control of file name or path in Microsoft Office SharePoint allows an authorized attacker to perform     spoofing over a network. (CVE-2026-54108)

  - Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office     SharePoint allows an authorized attacker to perform spoofing over a network. (CVE-2026-55016)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
327611	Security Updates for Microsoft SharePoint Server 2016 (July 2026)	Nessus	Windows : Microsoft Bulletins	critical
327610	Security Updates for Microsoft SharePoint Server 2019 (July 2026)	Nessus	Windows : Microsoft Bulletins	critical
327609	Security Updates for Microsoft SharePoint Server Subscription Edition (July 2026)	Nessus	Windows : Microsoft Bulletins	critical

Detections

Analytics

CVE-2026-54108

medium

Tenable Plugins

critical

critical

critical