ToolShell Zero-day: Microsoft Rushes Emergency Patch for Actively Exploited SharePoint Vulnerabilities

On July 19, 2025, Microsoft issued an emergency out-of-band security update to address two zero-day vulnerabilities in Microsoft SharePoint Server: CVE-2025-53770 and CVE-2025-53771. These vulnerabilities are under active exploitation in the wild and demand immediate attention to protect your on-premises SharePoint environments. CVE-2025-53770: Critical Remote Code Execution The first of the two vulnerabilities, CVE-2025-53770, is…

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