CVE-2026-88209: Microsoft SharePoint Server

Medium severity, CVSS 4.6. EPSS: 0.4% 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 authorized attacker to perform spoofing over a network.

Affected products

• Microsoft SharePoint Server: before 16.0.20326.20190 (fixed in 16.0.20326.20190)

Published 2026-10-13. Last modified 2026-10-14.