New zero-day in Gladinet re-enables patched RCE flaw
⚠️ Huntress has observed criminals exploiting a new zero-day (CVE-2025-11371) in Gladinet CentreStack and Triofox file-sharing servers that enables unauthenticated local file inclusion. The flaw can expose the application's Web.config machineKey, effectively re-enabling a prior ViewState deserialization RCE (CVE-2025-30406). Gladinet has not yet released a patch; Huntress advises disabling the UploadDownloadProxy temp handler as a mitigation. Huntress detected misuse across multiple customers and notes that SOC telemetry flagged irregular base64 payloads; administrators should assume 'fully patched' may not equal secure and isolate or disable vulnerable handlers until a vendor patch is available.
