Detect Gladinet CentreStack/Triofox Unauthorized File/Directory Access (CVE-2025-11371) in Microsoft Sentinel
Detects exploitation of CVE-2025-11371, a CWE-552 vulnerability in Gladinet CentreStack and Triofox where files or directories are accessible to external parties without proper authorization. This CISA KEV-listed vulnerability allows unauthenticated or unauthorized actors to access sensitive files and directories exposed by the affected file-sharing platform.
MITRE ATT&CK
- Tactic
- Collection Exfiltration
KQL Detection Query
union DeviceNetworkEvents, DeviceFileEvents, W3CIISLog
| where TimeGenerated > ago(24h)
| where (
(ActionType in ("ConnectionSuccess", "InboundConnectionAccepted") and RemoteIPType == "Public" and LocalPort in (80, 443, 8080, 8443))
or (csUriStem has_any ("/storage/", "/files/", "/share/", "/download/", "/content/") and sc-status in (200, 206))
or (csUriStem matches regex @"(?i)/(\.\.[\/\\]|%2e%2e[\/\\]|%252e%252e)")
)
| where DeviceName has_any ("centrestack", "triofox") or csHost has_any ("centrestack", "triofox")
| extend SuspiciousPath = iff(csUriStem matches regex @"(?i)/(windows|system32|etc/passwd|proc/|boot\.ini|\.ssh/|web\.config)", true, false)
| project TimeGenerated, DeviceName, RemoteIP, csUriStem, csMethod, sc-status, SuspiciousPath, csUserAgent
| order by TimeGenerated descDetects HTTP requests to Gladinet CentreStack or Triofox servers indicative of unauthorized file/directory enumeration or access, including path traversal patterns and access to sensitive system paths.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate authenticated users accessing shared files through the CentreStack or Triofox portal
- Automated backup or sync clients making bulk file access requests
- Security scanners or vulnerability assessment tools running authorized scans against the server
- CDN or reverse proxy health checks accessing content endpoints
Other platforms for CVE-2025-11371
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Unauthenticated File Enumeration via CentreStack Storage Endpoint
Expected signal: IIS access logs will show HTTP GET requests to /storage/, /files/, /share/ etc. from the test IP with no authentication headers. Responses of 200/206 indicate the vulnerability is present.
- Test 2Path Traversal Attempt Against CentreStack File Server
Expected signal: Web server logs will contain requests with URL-encoded traversal sequences. Windows Security Event Log Event ID 4663 may fire if file auditing is enabled and a real file is accessed.
- Test 3Bulk File Download Simulation from External IP
Expected signal: IIS logs will show high-volume sequential GET requests from a single external IP with large response sizes (sc-bytes). Network flow data will show sustained outbound data transfer to the test IP.
Unlock Pro Content
Get the full detection package for CVE-2025-11371 including response playbook, investigation guide, and atomic red team tests.