This vulnerability (CVE-2026-48562) 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. An attacker with authorized access can exploit this flaw to perform spoofing attacks over a network. The CVSS 3.1 base score is 4.6 (medium severity), with network attack vector, low attack complexity, requiring privileges and user interaction, impacting confidentiality and integrity but not availability. Microsoft has released an official fix for this vulnerability as detailed in their security update guide.

Exploitation of this vulnerability could allow an authorized attacker to conduct spoofing attacks by injecting malicious scripts into web pages generated by SharePoint Enterprise Server 2016. This may lead to limited confidentiality and integrity impacts, such as unauthorized disclosure or modification of information accessible to the attacker. There is no known exploitation in the wild at this time.

An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48562. No additional mitigation actions are specified by the vendor.