Using custom code, an attacker can write into name or description fields larger than the appropriate buffer size causing a stack-based buffer overflow on Host Engineering H0-ECOM100 Communications Module Firmware versions v5.0.155 and prior. This may allow an attacker to crash the affected device or cause it to become unresponsive.

The length of the input fields of Host Engineering H0-ECOM100, H2-ECOM100, and H4-ECOM100 modules are verified only on the client side when receiving input from the configuration web server, which may allow an attacker to bypass the check and send input to crash the device.