Eye Security Detects Large-Scale Exploitation of Critical Microsoft SharePoint Vulnerability
Last Friday, Eye Security’s research team, Eye Research, was the first to identify a critical zero-day vulnerability in Microsoft SharePoint (CVE-2025-53770 and CVE-2025-53771), just as attackers began exploiting it at scale. Their findings have since been acknowledged globally, with organizations across sectors relying on Eye Security’s early warnings and support to recover within hours.
The flaw allows attackers to take full control of vulnerable servers, giving them unrestricted access to sensitive business data, the ability to steal cryptographic material, install backdoors and move laterally through corporate networks. In many cases, this could result in data theft, ransomware attacks and prolonged breaches that remain undetected even after updates.
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