CVE-2020-1595: Microsoft SharePoint Enterprise Server

Critical severity, CVSS 9.9. EPSS: 2% chance of exploitation in the next 30 days.

<p>A remote code execution vulnerability exists in Microsoft SharePoint where APIs aren't properly protected from unsafe data input. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.</p> <p>Exploitation of this vulnerability requires that a user access a susceptible API on an affected version of SharePoint with specially-formatted input.</p> <p>The security update addresses the vulnerability by correcting how SharePoint handles deserialization of untrusted data.</p>

Affected products

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

Published 2020-09-11. Last modified 2026-06-17.