CVE-2024-12847
📋 TL;DR
This CVE describes an authentication bypass vulnerability in NETGEAR DGN1000 routers that allows remote unauthenticated attackers to execute arbitrary operating system commands as root via crafted HTTP requests to the setup.cgi endpoint. This affects NETGEAR DGN1000 routers running firmware versions before 1.1.00.48. The vulnerability has been actively exploited in the wild since at least 2017.
💻 Affected Systems
- NETGEAR DGN1000
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router with root-level command execution, allowing attackers to intercept network traffic, pivot to internal networks, install persistent malware, or brick the device.
Likely Case
Remote code execution leading to botnet enrollment, credential theft, DNS hijacking, or network surveillance.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access, though internal threats remain possible.
🎯 Exploit Status
Multiple public exploits exist (Exploit-DB IDs 25978, 43055). Actively exploited since at least 2017 with recent observations by Shadowserver Foundation in 2025.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.00.48
Vendor Advisory: https://www.netgear.com/about/security/
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to Advanced > Administration > Router Update. 3. Check for updates and install firmware version 1.1.00.48 or later. 4. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allDisable web management interface on WAN/Internet-facing interface
Network Segmentation
allPlace router in isolated network segment with strict firewall rules
🧯 If You Can't Patch
- Replace affected router with supported model
- Implement strict network access controls to block all inbound traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version via router web interface at Advanced > Administration > Router Status, or via command: curl -s http://router-ip/currentsetting.htm | grep FirmwareCheck Version:
curl -s http://[ROUTER_IP]/currentsetting.htm | grep FirmwareVerify Fix Applied:
Verify firmware version is 1.1.00.48 or higher using same method as above📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /setup.cgi with unusual parameters
- Multiple failed authentication attempts followed by successful access
- Unusual command execution in system logs
Network Indicators:
- HTTP POST requests to router IP on port 80/443 containing command injection patterns
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router.log" AND (url="/setup.cgi" OR (method="POST" AND uri="*setup.cgi*"))