CVE-2026-2151
📋 TL;DR
This CVE describes an OS command injection vulnerability in D-Link DIR-615 routers affecting the DMZ Host feature. Attackers can execute arbitrary commands on the device by manipulating the dmz_ipaddr parameter in adv_firewall.php. This affects users of unsupported D-Link DIR-615 routers with firmware version 4.10.
💻 Affected Systems
- D-Link DIR-615
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to install persistent backdoors, intercept network traffic, pivot to internal networks, or brick the device.
Likely Case
Attackers gain remote shell access to the router, enabling them to modify configurations, steal credentials, or use the device as a foothold for further attacks.
If Mitigated
Limited impact if the router is isolated from critical networks and has restricted administrative access, though the vulnerability still exists.
🎯 Exploit Status
Exploit requires authentication to access the DMZ Host configuration page. Public exploit details are available in disclosed references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
No official patch available as product is end-of-life. Replace affected hardware with supported models.
🔧 Temporary Workarounds
Disable DMZ Host Feature
allDisable the DMZ Host functionality in router settings to remove the vulnerable component.
Access router admin interface > Firewall Settings > Disable DMZ Host
Restrict Administrative Access
allLimit administrative access to the router to trusted internal IP addresses only.
Access router admin interface > Administration > Restrict Management Access to specific IPs
🧯 If You Can't Patch
- Isolate affected routers in a dedicated network segment with strict firewall rules
- Implement network monitoring for unusual outbound connections from router IPs
🔍 How to Verify
Check if Vulnerable:
Check router model and firmware version via admin interface. If DIR-615 with firmware 4.10, assume vulnerable.Check Version:
Login to router admin interface and check System Information or Status pageVerify Fix Applied:
Verify DMZ Host feature is disabled and administrative access is restricted to internal IPs only.📡 Detection & Monitoring
Log Indicators:
- Unusual administrative login attempts
- DMZ configuration changes
- Command execution patterns in system logs
Network Indicators:
- Unexpected outbound connections from router IP
- Traffic to known malicious IPs from router
SIEM Query:
source_ip="router_ip" AND (event_type="admin_login" OR event_type="config_change")