CVE-2025-2919
📋 TL;DR
This critical vulnerability in Netis WF-2404 routers allows attackers with physical access to activate test or debug logic via the UART interface, potentially gaining unauthorized access or control. It affects Netis WF-2404 router users, particularly those with devices in physically accessible locations. The vulnerability stems from hardware-level debug functionality that remains accessible at runtime.
💻 Affected Systems
- Netis WF-2404
📦 What is this software?
Netis Wf 2404 Firmware by Netis Systems
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router functionality, enabling persistent backdoor access, network traffic interception, credential theft, and lateral movement into connected networks.
Likely Case
Local attacker gains administrative access to router, modifies configurations, installs malware, or disrupts network services for targeted users.
If Mitigated
Limited impact due to physical access controls preventing unauthorized individuals from reaching the device's UART interface.
🎯 Exploit Status
Exploit requires physical UART connection to router board; detailed public disclosure includes hardware connection instructions and exploit steps.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None available
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider replacing affected hardware with supported alternatives.
🔧 Temporary Workarounds
Physical Security Hardening
allSecure physical access to router devices to prevent unauthorized UART connection
UART Interface Disable
allPhysically disable or obscure UART pins on router board to prevent connection
🧯 If You Can't Patch
- Decommission and replace affected Netis WF-2404 routers with supported, secure alternatives
- Implement strict physical access controls: locked cabinets, surveillance, access logs for router locations
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or serial console; if version is 1.1.124EN, device is vulnerableCheck Version:
Check router web interface at 192.168.1.1 or use serial console connection to view firmware versionVerify Fix Applied:
No fix available to verify; replacement with different hardware is the only mitigation📡 Detection & Monitoring
Log Indicators:
- Unexpected device reboots
- Configuration changes without authorized access
- Unknown serial/console access attempts
Network Indicators:
- Sudden changes in router behavior or network traffic patterns
- Unauthorized DNS or routing changes
SIEM Query:
Device logs showing physical tampering indicators or unauthorized configuration modifications