CVE-2026-26105: Microsoft SharePoint Server

Critical severity, CVSS 9.3. EPSS: 1.2% chance of exploitation in the next 30 days.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Affected products

• Microsoft SharePoint Server: before 16.0.19725.20076 (fixed in 16.0.19725.20076); version 2016 only; version 2019 only

Published 2026-03-10. Last modified 2026-06-17.