Microsoft SharePoint Deserialization Remote Code Execution
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, 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 unauthorized 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.
Isolate SharePoint servers using network segmentation to reduce exposure and prevent lateral movement in case of compromise. Implement robust endpoint detection and response (EDR) agents on all SharePoint servers to monitor for and detect suspicious activity. Enhance logging and alerts for unusual process execution, network connections, or file modifications originating from SharePoint processes.
Apply the official security patches released by Microsoft immediately to address the deserialization vulnerability. Ensure all SharePoint server installations are updated to the latest secure versions as recommended by Microsoft. Regularly review and adhere to Microsoft's security configuration baselines for SharePoint to prevent reintroduction of similar issues.
An unauthorized attacker can achieve remote code execution on the affected SharePoint server. This allows for full system compromise, leading to data exfiltration, service disruption, and potential lateral movement within the network. The business consequences include severe data breaches, loss of critical business functionality, and significant reputational damage.
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 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.
Weak authentication in Microsoft Office SharePoint allows an unauthorized attacker to bypass a security feature over a network.