
Updated: ACTIVE EXPLOITATION ALERT: Zero-Day Vulnerability Affecting Self-Hosted SharePoint Servers (CVE-2025-53770/53771)
Updated on 24 July 2025 to add links to external references and add guidance around applying security updates published by Microsoft. Overview: On July 18, 2025, Eye Security identified large-scale exploitation of a zero-day SharePoint vulnerability chain that enables unauthenticated remote code execution (RCE). Within hours, attackers were actively compromising self-hosted SharePoint servers worldwide, deploying… Continue reading Updated: ACTIVE EXPLOITATION ALERT: Zero-Day Vulnerability Affecting Self-Hosted SharePoint Servers (CVE-2025-53770/53771)