CVE-2025-15388
📋 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 Firewall products 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 system compromise allowing attackers to install persistent backdoors, steal sensitive data, pivot to internal networks, and disrupt VPN/firewall services.
Likely Case
Attackers gain shell access to execute commands, potentially stealing credentials, modifying firewall rules, or using the device as a pivot point into the internal network.
If Mitigated
With proper network segmentation and strong authentication controls, impact may be limited to the firewall device itself without lateral movement.
🎯 Exploit Status
Command injection vulnerabilities are typically easy to exploit once authentication is bypassed or obtained
🛠️ 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 vendor website for firmware updates 2. Download latest firmware for your model 3. Backup current configuration 4. Apply firmware update through web interface 5. Restart device 6. Verify fix and restore configuration
🔧 Temporary Workarounds
Restrict Management Access
allLimit VPN firewall management interface access to trusted IP addresses only
Configure firewall rules to restrict management interface access to specific source IPs
Enforce Strong Authentication
allImplement multi-factor authentication and strong password policies for VPN firewall management
Enable MFA if supported, enforce complex passwords, disable default credentials
🧯 If You Can't Patch
- Isolate VPN firewall management interface on separate VLAN with strict access controls
- Implement network monitoring and IDS/IPS rules to detect command injection attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory; test authenticated command injection if authorizedCheck Version:
Check web interface System Status or About page for firmware versionVerify Fix Applied:
Verify firmware version matches patched version from vendor; test command injection attempts fail📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts followed by successful login
- Suspicious system commands from management interface
Network Indicators:
- Unusual outbound connections from firewall device
- Command injection patterns in HTTP requests to management interface
SIEM Query:
source="vpn_firewall" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")