CVE-2021-26418: Microsoft SharePoint Foundation

Medium severity, CVSS 4.6. EPSS: 1.2% chance of exploitation in the next 30 days.

Microsoft SharePoint Server Spoofing Vulnerability

Affected products

• Microsoft SharePoint Foundation: version 2013 only
• Microsoft SharePoint Server: version 2016 only; version 2019 only

Published 2021-05-11. Last modified 2026-06-17.