CVE-2025-56706
📋 TL;DR
The Edimax BR-6473AX router firmware version 1.0.28 contains a remote code execution vulnerability in the openwrt_getConfig function. Attackers can exploit this by sending specially crafted Object parameters to execute arbitrary code on affected devices. This affects all users running the vulnerable firmware version.
💻 Affected Systems
- Edimax BR-6473AX
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing attackers to install persistent malware, intercept all network traffic, pivot to internal networks, and use the device as part of botnets.
Likely Case
Device takeover leading to network surveillance, credential theft, and use in DDoS attacks or cryptocurrency mining operations.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept available on GitHub demonstrates exploitation. The vulnerability requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Edimax website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Network Access Control
linuxRestrict access to router management interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
Disable Remote Management
allTurn off remote administration features if not required
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict firewall rules
- Implement network monitoring for suspicious traffic to/from router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface or via SSH: cat /etc/openwrt_releaseCheck Version:
cat /etc/openwrt_release | grep VERSIONVerify Fix Applied:
Verify firmware version is updated beyond v1.0.28📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to router management interface
- Suspicious process execution in system logs
- Failed authentication attempts to admin interface
Network Indicators:
- Unexpected outbound connections from router
- Traffic to known malicious IPs from router
- Port scanning originating from router
SIEM Query:
source="router.log" AND ("openwrt_getConfig" OR "POST /cgi-bin/luci") AND status=200