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Critical RCE in Microsoft SharePoint via deserialization. Exploited in the wild. Apply mitigation now; patch from Microsoft is pending.
An unauthorized attacker can exploit this vulnerability to execute arbitrary code over the network without authentication. This poses a severe risk to confidentiality, integrity, and availability of the SharePoint server.
Microsoft SharePoint Server
Remediation: Apply the mitigation measures recommended in Microsoft's CVE advisory until the official patch is released. Monitor Microsoft’s update page for release of a comprehensive security update.
Patch is under development by Microsoft. Refer to the official CVE advisory.
Apply the mitigation steps described in Microsoft’s CVE documentation.
Limit external access to SharePoint Server
Monitor SharePoint server logs for deserialization activity or anomalous behavior. Use endpoint detection tools to identify exploit attempts.
7/18/2025
Not specified
No affected organizations specified
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