CVE-2025-49706

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

Score

CVSS 3.1 6.5 Medium

Status

Analyzed - secure@microsoft.com

Published

2025-07-08

Last modified

2026-08-04

Known exploited (CISA KEV)

since 2025-07-22, action due 2025-07-23: 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.

Weaknesses

CWE-287

Affected products

• Sharepoint Enterprise Server (Microsoft)
• Sharepoint Server (Microsoft)
• Sharepoint Server 2016 (Microsoft)
• Sharepoint Server 2019 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49706
• https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulne…