Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized 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:

  - Remote Code Execution vulnerabilities (CVE-2026-26106,   CVE-2026-26113, CVE-2026-26114)   
  - Spoofing vulnerability in Microsoft SharePoint Server   Subscription Edition (CVE-2026-26105)

Note that Nessus has not tested for these issues but instead relies 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:

  - Remote Code Execution vulnerabilities (CVE-2026-26106, CVE-2026-26113)

  - Spoofing vulnerability in Microsoft SharePoint Server Subscription Edition (CVE-2026-26105)

Note that Nessus has not tested for this issue 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:

  - Remote Code Execution vulnerabilities (CVE-2026-26106,   CVE-2026-26113, CVE-2026-26114)   
  - Spoofing vulnerability in Microsoft SharePoint Server   Subscription Edition (CVE-2026-26105)

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

ID	Name	Product	Family	Severity
301779	Security Updates for Microsoft SharePoint Server 2016 (March 2026)	Nessus	Windows : Microsoft Bulletins	critical
301775	Security Updates for Microsoft SharePoint Server Subscription Edition (March 2026)	Nessus	Windows : Microsoft Bulletins	critical
301762	Security Updates for Microsoft SharePoint Server 2019 (March 2026)	Nessus	Windows : Microsoft Bulletins	critical

Detections

Analytics

CVE-2026-26105

critical

Tenable Plugins

critical

critical

critical