SharePoint ToolShell Exploitation

The [SharePoint ToolShell Exploitation](https://attack.mitre.org/campaigns/C0058) campaign was conducted in July 2025 and encompassed the first waves of exploitation against incompletely patched spoofing (CVE-2025-49706) and remote code execution (CVE-2025-49704) vulnerabilities affecting on-premises Microsoft SharePoint servers. Later patched and updated as CVE-2025-53770 and CVE-2025-53771, the ToolShell vulnerabilities were widely exploited including by China-based ransomware actor Storm-2603 and espionage actors [Threat Group-3390](https://attack.mitre.org/groups/G0027) and [ZIRCONIUM](https://attack.mitre.org/groups/G0128). [SharePoint ToolShell Exploitation](https://attack.mitre.org/campaigns/C0058) targeted multiple regions and industries including finance, education, energy, and healthcare across Asia, Europe, and the United States.(Citation: Microsoft SharePoint Exploit JUL 2025)(Citation: Palo Alto SharePoint Vulnerabilities JUL 2025)(Citation: Eye Research ToolShell JUL 2025)(Citation: ESET ToolShell JUL 2025)(Citation: Trend Micro SharePoint Attacks JUL 2025)