CVE-2025-49706
Microsoft SharePoint Improper Authentication Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2025-07-22. Federal due date: 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.
Impact
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Sharepoint Enterprise Server | Version 2016 |
| Microsoft | Sharepoint Server | before 16.0.18526.20424 Version 2019 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- 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-vulnerabilities/