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Active exploitation of on-premise SharePoint Server vulnerabilities “ToolShell”
On July 19th 2025, Microsoft reported on a set of vulnerabilities being actively exploited in-the-wild targeting on-premise SharePoint Servers, which were addressed through CVE-2025-53770 and CVE-2025-53771, as well as its earlier variants CVE-2025-49704 and CVE-2025-49706, dubbed as ToolShell. The earliest exploitation patterns WithSecure observed in its telemetry suggests exploitation attempts as early as 7th July 2025.
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