CVE-2026-45659

No fix known ExploitedEPSS 80%CVSS 8.8

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

Published 2026-05-22 · In CISA KEV since 2026-07-01 · CVE record · OSV

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