Exploited Zero-Day in Gladinet CentreStack: Rapid RCE and the Need for Zero Trust
In October 2025, Gladinet patched a critical zero-day vulnerability (CVE-2025-11371) in its CentreStack file-sharing software, which had been exploited by threat actors since late September. The attackers leveraged a local file inclusion flaw to access the application's Web.config file and extract the machine key, subsequently exploiting a chained deserialization vulnerability (CVE-2025-30406) to achieve unauthenticated remote code execution. The service's SYSTEM-level privileges enabled lateral movement and sensitive file access. Gladinet released mitigations and a full patch, urging immediate client upgrades to prevent further compromise of business environments. This incident highlights a continuing trend in targeting widely used business collaboration platforms via sophisticated vulnerability chaining, often bypassing previous mitigations. The exploitation’s speed and public proof-of-concept release underscore the growing urgency for rapid patch management and proactive threat detection across enterprise SaaS deployments.
Kill Chain