CVE-2025-58467
📋 TL;DR
A relative path traversal vulnerability in Qsync Central allows authenticated attackers to read arbitrary files on the system. This affects all Qsync Central installations before version 5.0.0.4. Attackers need valid user credentials to exploit this vulnerability.
💻 Affected Systems
- Qsync Central
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through reading sensitive configuration files, credentials, or system data leading to privilege escalation or lateral movement.
Likely Case
Unauthorized access to sensitive files containing configuration data, user information, or application secrets.
If Mitigated
Limited file access within the application's directory if proper access controls and file permissions are configured.
🎯 Exploit Status
Exploitation requires valid user credentials. Path traversal vulnerabilities are typically straightforward to exploit once authentication is bypassed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Qsync Central 5.0.0.4 (2026/01/20) and later
Vendor Advisory: https://www.qnap.com/en/security-advisory/qsa-26-02
Restart Required: Yes
Instructions:
1. Log into QNAP App Center. 2. Check for updates to Qsync Central. 3. Install version 5.0.0.4 or later. 4. Restart the Qsync Central service or the entire QNAP device.
🔧 Temporary Workarounds
Restrict User Access
allLimit user accounts to only those necessary and implement strong authentication controls.
Network Segmentation
allIsolate Qsync Central from sensitive network segments and limit external access.
🧯 If You Can't Patch
- Implement strict file system permissions to limit what files the Qsync Central service account can access.
- Deploy network-based intrusion detection systems to monitor for path traversal patterns in HTTP requests.
🔍 How to Verify
Check if Vulnerable:
Check Qsync Central version in QNAP App Center. If version is earlier than 5.0.0.4, the system is vulnerable.Check Version:
Check via QNAP web interface: App Center > Installed Apps > Qsync CentralVerify Fix Applied:
Confirm Qsync Central version is 5.0.0.4 or later in QNAP App Center after update.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in Qsync Central logs
- HTTP requests containing '../' or directory traversal sequences
Network Indicators:
- HTTP requests with path traversal payloads to Qsync Central endpoints
SIEM Query:
source="Qsync Central" AND ("../" OR "..\\" OR "%2e%2e%2f")