Microsoft SharePoint Server - RCE (CVE-2025-53770)
194Exploiting 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. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2025-53770 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2025-53770 is currently experiencing high visibility and active exploitation across the internet.
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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