Multiple Hacker Groups Exploit SharePoint 0-Day Vulnerability in the Wild

Microsoft has confirmed that a pair of zero-day vulnerabilities in on-premises SharePoint Server, collectively dubbed ToolShell, are under active exploitation by diverse threat actors ranging from opportunistic cybercriminals to sophisticated nation-state advanced persistent threat (APT) groups. ToolShell encompasses CVE-2025-53770, a critical remote code execution (RCE) flaw allowing unauthenticated attackers to execute arbitrary code on vulnerable […]

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