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.

Detections

Analytics

Security Updates for Microsoft SharePoint Server Subscription Edition (July 2026)

critical Nessus Plugin ID 327609

Version 1.4

Version 1.3

Version 1.1

Version 1.4 Jul 23, 2026, 6:31 PM CISA reference Plugin Feed: 202607231831
Version 1.3 Jul 22, 2026, 11:06 PM CISA reference Plugin Feed: 202607222306
Version 1.1 Jul 18, 2026, 3:00 PM New Plugin Feed: 202607181500