Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Confirm exposure before applying a vendor-supported change.
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.
Due date: 2025.07.23Confirm that Microsoft Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition and an affected version are present.
Combine exploitation signals with asset exposure and business criticality.
Follow the vendor advisory or supported update path and preserve rollback options.
Recheck the version, service health, access paths, and relevant logs.
