This vulnerability (CVE-2026-47636) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It is classified as CWE-79, indicating improper neutralization of input during web page generation, which leads to cross-site scripting (XSS). This flaw allows an attacker to inject malicious scripts that could be executed in the context of a victim's browser, enabling spoofing attacks over the network. The vulnerability has a CVSS 3.1 base score of 5.4 (medium severity), with network attack vector, low attack complexity, no privileges required, and requiring user interaction. Microsoft has published an official fix for this vulnerability as indicated in their security update guide.

Successful exploitation of this vulnerability could allow an attacker to perform cross-site scripting attacks, leading to spoofing over the network. This may result in limited confidentiality and integrity impacts, such as the attacker tricking users into executing malicious scripts. There is no impact on availability. No known exploits are reported in the wild at this time.

An official fix is available from Microsoft for this vulnerability. Users and administrators of Microsoft SharePoint Enterprise Server 2016 should apply the security update provided by Microsoft as detailed in their advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47636) to remediate this issue.