CVE-2025-28219
📋 TL;DR
Netgear DC112A V1.0.0.64 contains an OS command injection vulnerability in the usb_adv.cgi endpoint that allows remote attackers to execute arbitrary commands via the 'deviceName' parameter in POST requests. This affects all users of the vulnerable firmware version. Attackers can gain complete control of affected devices without authentication.
💻 Affected Systems
- Netgear DC112A
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing installation of persistent malware, network pivoting to internal systems, data exfiltration, and participation in botnets.
Likely Case
Remote code execution leading to device takeover, credential theft, and use as a foothold for further network attacks.
If Mitigated
Limited impact if device is isolated behind firewalls with strict network segmentation and access controls.
🎯 Exploit Status
The vulnerability is well-documented with technical details available in the reference PDF. Exploitation requires sending a crafted POST request to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Netgear support for firmware updates. 2. If update available, download from official Netgear site. 3. Access device web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot device.
🔧 Temporary Workarounds
Network Isolation
allPlace device behind firewall with strict inbound rules, blocking access to web interface from untrusted networks.
Access Control
allImplement network segmentation to restrict device access to authorized management networks only.
🧯 If You Can't Patch
- Replace device with updated model or different vendor product
- Implement strict network segmentation and firewall rules to isolate device from internet and internal networks
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or SSH if enabled. Navigate to System Information or similar section.Check Version:
curl -s http://device-ip/ | grep -i firmware || ssh admin@device-ip 'cat /etc/version'Verify Fix Applied:
Verify firmware version has been updated to a version later than V1.0.0.64. Test if usb_adv.cgi endpoint still accepts malicious deviceName parameters.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /usb_adv.cgi
- Suspicious deviceName parameter values containing shell metacharacters
- Unexpected process execution in system logs
Network Indicators:
- POST requests to usb_adv.cgi with shell commands in parameters
- Outbound connections from device to unusual destinations
SIEM Query:
source="device_logs" AND (uri_path="/usb_adv.cgi" AND (deviceName="*;*" OR deviceName="*|*" OR deviceName="*`*"))