Medium [CVE-2025-49706] Microsoft SharePoint Server Spoofing Vulnerability
This medium-severity Microsoft Server advisory covers CVE-2025-49706 affecting Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition.
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Summary
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Affected products named by the advisory: Microsoft SharePoint Enterprise Server 2016; Microsoft SharePoint Server 2019; Microsoft SharePoint Server Subscription Edition.
CISA Known Exploited Vulnerability
- Listed:
- Jul 22, 2025 · federal remediation due Jul 23, 2025
- 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.
- Ransomware use:
- Known
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- Microsoft SharePoint Enterprise Server 2016 16.0.0 before 16.0.5508.1000
- Microsoft SharePoint Server 2019 16.0.0 before 16.0.10417.20027
- Microsoft SharePoint Server Subscription Edition 16.0.0 before 16.0.18526.20424
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 16.0.5508.1000
- 16.0.10417.20027
- 16.0.18526.20424
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 16.0.5508.1000, 16.0.10417.20027, 16.0.18526.20424. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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