CVE-2025-9026
📋 TL;DR
This CVE describes a remote command injection vulnerability in D-Link DIR-860L routers via the Simple Service Discovery Protocol (SSDP) service. Attackers can execute arbitrary operating system commands on affected devices without authentication. Only unsupported legacy devices running firmware version 2.04.B04 are affected.
💻 Affected Systems
- D-Link DIR-860L
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, pivot to internal networks, steal credentials, or use the device for botnet activities.
Likely Case
Device takeover for use in DDoS botnets, credential harvesting from connected devices, or network reconnaissance.
If Mitigated
Limited impact if device is behind strict firewall rules and network segmentation prevents lateral movement.
🎯 Exploit Status
Exploit code is publicly available on GitHub. Attack requires no authentication and can be automated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
No official patch available. Device is end-of-life. Replace with supported hardware.
🔧 Temporary Workarounds
Disable SSDP Service
allTurn off Simple Service Discovery Protocol service if not required
Access router admin interface > Advanced > UPnP > Disable
Network Segmentation
allIsolate affected devices from critical network segments
🧯 If You Can't Patch
- Immediately replace affected devices with supported hardware
- Implement strict firewall rules blocking all inbound traffic to affected devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is 2.04.B04, device is vulnerable.Check Version:
Login to router admin interface and check Firmware Version under StatusVerify Fix Applied:
No fix available. Verify device replacement or workaround implementation.📡 Detection & Monitoring
Log Indicators:
- Unusual SSDP traffic patterns
- Unexpected process execution in router logs
- Failed authentication attempts from router IP
Network Indicators:
- SSDP requests with suspicious payloads
- Outbound connections from router to unknown IPs
- Port scanning originating from router
SIEM Query:
source_ip=ROUTER_IP AND (protocol="SSDP" OR dest_port=1900) AND payload CONTAINS "cmd" OR "sh" OR "bash"