Microsoft SharePoint Deserialization of Untrusted Data RCE
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An attacker with a basic user account, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
Restrict network access to SharePoint servers as much as possible, implementing network segmentation to isolate critical instances. Configure Web Application Firewalls (WAFs) to detect and block unusual payload structures or deserialization patterns. Enhance monitoring of SharePoint server logs for suspicious process creation or outbound connections, focusing on activities by authorized users.
Apply the official security patches released by Microsoft immediately to address the deserialization vulnerability. Regularly consult Microsoft's security advisories and update guides for specific version requirements and deployment instructions. Ensure all affected Microsoft Office SharePoint installations are updated to a non-vulnerable version to permanently resolve this RCE flaw.
An authorized attacker can achieve Remote Code Execution (RCE) on the vulnerable Microsoft Office SharePoint server by exploiting deserialization of untrusted data. This allows them to fully compromise the server, leading to data exfiltration, service disruption, or further network intrusion. The consequences include significant data loss, operational downtime, and potential compliance breaches.
Other CVEs affecting sharepoint server
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.
Microsoft SharePoint Server Elevation of Privilege Vulnerability
A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka 'Microsoft SharePoint Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0594.