CVE-2026-1506
📋 TL;DR
This CVE describes an OS command injection vulnerability in D-Link DIR-615 routers via the MAC Filter Configuration component. Attackers can execute arbitrary commands remotely by manipulating the 'mac' parameter in /adv_mac_filter.php. Only unsupported legacy devices are affected.
💻 Affected Systems
- D-Link DIR-615
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full router compromise allowing attacker to intercept traffic, pivot to internal networks, install persistent backdoors, or brick the device.
Likely Case
Router takeover enabling traffic monitoring, credential theft, and network disruption.
If Mitigated
Limited impact if device is isolated, but still vulnerable to compromise.
🎯 Exploit Status
Public disclosure includes technical details. Simple command injection via HTTP parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
No official patch exists as product is end-of-life. Replace hardware with supported model.
🔧 Temporary Workarounds
Disable web interface access
linuxBlock external access to router administration interface
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable MAC filtering feature
allTurn off MAC address filtering if not required
🧯 If You Can't Patch
- Immediately replace DIR-615 routers with supported hardware
- Isolate vulnerable routers in separate VLAN with strict firewall rules
🔍 How to Verify
Check if Vulnerable:
Check router model and firmware version via web interface at 192.168.0.1 or serial consoleCheck Version:
curl -s http://192.168.0.1/ | grep -i 'dir-615' || ssh admin@router 'show version'Verify Fix Applied:
Verify replacement with supported router model📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /adv_mac_filter.php
- Commands like ';', '|', '&' in URL parameters
- Unexpected process execution in router logs
Network Indicators:
- HTTP requests with shell metacharacters in parameters
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router.log" AND (url="/adv_mac_filter.php" OR (parameter="mac" AND value MATCHES "[;&|`]"))