CVE-2025-15389
📋 TL;DR
This vulnerability allows authenticated remote attackers to execute arbitrary operating system commands on QNO Technology VPN Firewall devices. Attackers with valid credentials can inject malicious commands through vulnerable interfaces, potentially gaining full control of affected systems. Organizations using QNO VPN Firewalls are at risk.
💻 Affected Systems
- QNO Technology VPN Firewall
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the firewall device, allowing attackers to pivot to internal networks, steal credentials, install persistent backdoors, and disrupt network operations.
Likely Case
Attackers gain shell access to the firewall, enabling network reconnaissance, credential harvesting, and lateral movement to connected systems.
If Mitigated
With proper network segmentation and authentication controls, impact is limited to the firewall device itself, though it remains a significant security risk.
🎯 Exploit Status
Exploitation requires valid credentials but command injection is straightforward once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references; check vendor advisory
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-10614-dee41-2.html
Restart Required: Yes
Instructions:
1. Check QNO Technology website for security updates. 2. Download latest firmware. 3. Backup configuration. 4. Apply firmware update. 5. Reboot device. 6. Verify update success.
🔧 Temporary Workarounds
Restrict Management Access
allLimit VPN firewall management interface access to trusted IP addresses only
Configure firewall rules to restrict management interface access
Enforce Strong Authentication
allImplement multi-factor authentication and strong password policies for VPN firewall access
🧯 If You Can't Patch
- Isolate the VPN firewall in a dedicated network segment with strict access controls
- Implement network monitoring and intrusion detection specifically for the firewall management interface
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor's patched versions listCheck Version:
Check device web interface or CLI for firmware version informationVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in firewall logs
- Multiple failed authentication attempts followed by successful login and command execution
Network Indicators:
- Unusual outbound connections from firewall device
- Suspicious traffic patterns from firewall management interface
SIEM Query:
source="firewall_logs" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")