CVE-2025-49706: Microsoft SharePoint Improper Authentication Vulnerability

Medium severity, CVSS 6.5. Actively exploited: in CISA KEV since 2025-07-22. EPSS: 99.1% 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 Enterprise Server: version 2016 only
• Microsoft SharePoint Server: before 16.0.18526.20424 (fixed in 16.0.18526.20424); version 2019 only

Published 2025-07-08. Last modified 2026-08-04.