Actively exploited in the wild
Microsoft SharePoint Improper Authentication Vulnerability
Microsoft - SharePoint · Listed in the CISA KEV since 2025-07-22. This indicates confirmed attacks in production environments.
Required action: Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
CVE-2025-49706
MediumCVSS 6.5KEVExploitation Probability (EPSS)
Very high risk100th percentile - higher than 100% of all known CVEs
Summary
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Risk Assessment
An attacker can impersonate another user or system, potentially leading to trust compromise and unauthorized actions.
Recommendation
Apply security updates from Microsoft and implement additional authentication mechanisms such as MFA.
Original NVD description (English source)
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.