CVE-2026-20963

No fix known ExploitedEPSS 29%CVSS 9.8

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

Published 2026-01-13 · In CISA KEV since 2026-03-18 · CVE record · OSV

Products: Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition