CVE-2026-2056
📋 TL;DR
This vulnerability in D-Link DIR-605L and DIR-619L routers allows remote attackers to access sensitive information through the DHCP Connection Status Handler. The exploit targets the /wan_connection_status.asp file, potentially exposing network configuration details. Only products no longer supported by the vendor are affected.
💻 Affected Systems
- D-Link DIR-605L
- D-Link DIR-619L
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain sensitive network configuration information, potentially enabling further attacks or network reconnaissance.
Likely Case
Information disclosure revealing DHCP lease details, network topology, or device configuration.
If Mitigated
Limited impact if devices are behind firewalls or not internet-facing.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Remote exploitation without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
No official patch available as products are end-of-life. Replace with supported hardware.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers from internet and sensitive network segments
Access Control Lists
linuxBlock external access to router management interface
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Replace affected routers with supported models
- Implement network monitoring for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router model and firmware version via web interface at http://router-ip/Check Version:
curl -s http://router-ip/ | grep -i 'firmware' || check web interfaceVerify Fix Applied:
Verify router replacement or network isolation measures📡 Detection & Monitoring
Log Indicators:
- Unusual access to /wan_connection_status.asp
- Multiple failed or successful access attempts to router management interface
Network Indicators:
- External IP addresses accessing router management ports
- Unusual traffic patterns to router IP
SIEM Query:
source_ip=external AND dest_port IN (80,443) AND url_path="/wan_connection_status.asp"