CVE-2026-88164: Microsoft SharePoint Server Subscription Edition

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Affected products

• Microsoft Microsoft SharePoint Server Subscription Edition: from 16.0.0, before 16.0.20326.20190 (fixed in 16.0.20326.20190)

Published 2026-10-14. Last modified 2026-10-16.