News | 24 Jul 2025
Review the full advisory from Beazley Security Lab here: 🔗 SharePoint 0Day Vulnerability Under Active Exploitation (CVE-2025-53770) Overview of the Threat On July 18, 2025, the cybersecurity community identified active exploitation of a critical zero-day Remote Code Execution (RCE) vulnerability in on-premises Microsoft SharePoint servers. Tracked as CVE-2025-53770 and dubbed “ToolShell,” this flaw allows unauthenticated attackers to: Upload malicious ASP.NET …