CVE-2026-65663: Microsoft SharePoint Server

High severity, CVSS 8.8. EPSS: 2% chance of exploitation in the next 30 days.

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Affected products

• Microsoft SharePoint Server: before 16.0.19725.20522 (fixed in 16.0.19725.20522); version 2016 only; version 2019 only

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