CVE-2025-49706
Microsoft SharePoint Improper Authentication Vulnerability
IN CISA KEV
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
- Vendor
- Microsoft
- Product
- SharePoint
- CVSS 3.1
- 6.5 (medium), scored by secure@microsoft.comCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CWE
- CWE-287
- Published
- 2025-07-08
- NVD modified
- 2026-08-04
- NVD status
- Analyzed
CISA KEV
- Date added
- 2025-07-22
- Due date
- 2025-07-23
- Ransomware use
- Known
- 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.
EPSS
99.1% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- msrc.microsoft.com (Vendor Advisory)
- www.cisa.gov (US Government Resource)
- www.microsoft.com (Press/Media Coverage, Vendor Advisory)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.