Microsoft SharePoint Server - RCE (CVE-2025-53770)
462Exploiting IPs reported
Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.
CrowdSec analysis
CVE-2025-53770 is a vulnerability in Microsoft SharePoint Server that allows an unauthorized attacker to execute code over a network. This issue affects on-premises installations of SharePoint Server.
CrowdSec has been tracking this vulnerability and its exploits since 21st of July 2025.
CrowdSec network data shows that most actors exploiting CVE-2025-53770 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature. CrowdSec data also reveals a clear uptick in attacks involving CVE-2025-53770 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.
Attackers can exploit this vulnerability by sending specially crafted requests to the SharePoint Server, targeting /_layouts/15/ToolPane.aspx with a special Referer header.
Exploitation
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Common Weakness Enumeration (CWE)
Protection
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Blocklist
With our advanced worldwide network detection, CrowdSec can provide a list of IPs known for exploiting the vulnerability.
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