CVE-2025-70161
📋 TL;DR
EDIMAX BR-6208AC V2 router firmware version 1.02 contains a command injection vulnerability in the pppUserName field that allows attackers to execute arbitrary commands on the device. This affects all users of this specific router model and firmware version. Successful exploitation gives attackers full control over the router.
💻 Affected Systems
- EDIMAX BR-6208AC V2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router allowing attacker to pivot to internal network, intercept/modify traffic, install persistent backdoors, or use router as botnet node.
Likely Case
Router takeover leading to network traffic interception, DNS hijacking, credential theft, and lateral movement to connected devices.
If Mitigated
Limited impact if router is behind firewall with strict inbound rules and network segmentation prevents lateral movement.
🎯 Exploit Status
Exploitation requires access to web interface. The vulnerability is well-documented with proof-of-concept available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check EDIMAX website for firmware updates
2. Download latest firmware for BR-6208AC V2
3. Access router web interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable WAN Web Interface Access
linuxPrevent external access to vulnerable web interface
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Change Default Credentials
allUse strong unique credentials to limit attack surface
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network monitoring for suspicious router traffic
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or Administration sectionCheck Version:
curl -s http://router-ip/status.cgi | grep firmwareVerify Fix Applied:
Verify firmware version is updated beyond 1.02 and test pppUserName field with safe test payloads📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts to web interface
- PPP configuration changes from unexpected sources
Network Indicators:
- Outbound connections from router to suspicious IPs
- DNS queries to malicious domains from router
- Unexpected port scans originating from router
SIEM Query:
source="router.log" AND ("system()" OR "pppUserName" OR "setWAN")