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.

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

  - Improper authentication in Microsoft Office SharePoint allows an authorized attacker to elevate privileges     over a network. (CVE-2026-62827)

  - Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker     to elevate privileges over a network. (CVE-2026-64921)

  - Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute     code over a network. (CVE-2026-63514)

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:

  - Improper authentication in Microsoft Office SharePoint allows an authorized attacker to elevate privileges     over a network. (CVE-2026-62827)

  - Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker     to elevate privileges over a network. (CVE-2026-64921)

  - Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute     code over a network. (CVE-2026-65665)

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:

  - Improper authentication in Microsoft Office SharePoint allows an authorized attacker to elevate privileges     over a network. (CVE-2026-62827)

  - Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker     to elevate privileges over a network. (CVE-2026-64921)

  - Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute     code over a network. (CVE-2026-65665)

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	Type	Severity
334622	Security Updates for Microsoft SharePoint Server 2016 (August 2026)	Nessus	Windows : Microsoft Bulletins	Local	high
334620	Security Updates for Microsoft SharePoint Server Subscription Edition (August 2026)	Nessus	Windows : Microsoft Bulletins	Local	high
334613	Security Updates for Microsoft SharePoint Server 2019 (August 2026)	Nessus	Windows : Microsoft Bulletins	Local	high

Detections

Analytics

CVE-2026-64922

medium

Tenable Plugins

high

high

high