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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Client Challenge

Client Challenge JavaScript is disabled in your browser. Please enable JavaScript to proceed. A required part of this site couldn’t load. This may be due to a browser extension, network issues, or browser settings. Please check your connection, disable any ad blockers, or try using a different browser. Source link

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