This vulnerability (CVE-2026-45462) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is a CWE-79 type cross-site scripting issue caused by improper input neutralization during web page generation. An authorized attacker could exploit this to conduct spoofing attacks over a network. The CVSS 3.1 base score is 4.6, reflecting a medium severity with network attack vector, low attack complexity, requiring privileges and user interaction, and impacts confidentiality and integrity. Microsoft has released an official fix for this vulnerability as documented in their security update guide.

Exploitation of this vulnerability could allow an authorized attacker to perform spoofing attacks, potentially misleading users or systems by injecting malicious scripts into web pages generated by SharePoint. The impact is limited to confidentiality and integrity with no availability impact. No known exploits are reported in the wild at this time.

An official fix is available from Microsoft. Users and administrators of Microsoft SharePoint Enterprise Server 2016 (version 16.0.0) should apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45462 to remediate this vulnerability.