CVE-2025-53771: Microsoft SharePoint Server

Medium severity, CVSS 6.5. EPSS: 99.9% chance of exploitation in the next 30 days.

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Affected products

• Microsoft SharePoint Server: before 16.0.18526.20508 (fixed in 16.0.18526.20508); version 2016 only; version 2019 only

Published 2025-07-20. Last modified 2026-06-17.