CVE-2026-70355: Microsoft SharePoint Server

High severity, CVSS 8.7. EPSS: 0.8% 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 elevate privileges over a network.

Affected products

• Microsoft SharePoint Server: before 16.0.19725.20522 (fixed in 16.0.19725.20522); version 2019 only

Published 2026-08-11. Last modified 2026-08-13.