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10.0
CVE-2026-12846: GV-I/O Box 4E: Unauthorized Network Access and Data Overflow
CVE-2026-12846
Summary
The GV-I/O Box 4E has a service that listens for incoming network messages without a password. This allows anyone on the network to interact with the device. Additionally, the device is vulnerable to a data overflow that can cause it to crash or behave unexpectedly.
Original title
GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485.
DVRSearch is a service running by default on the IOBox listening for UDP ...
Original description
GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485.
DVRSearch is a service running by default on the IOBox listening for UDP messages on port 10001. Any user on the network can send messages to this service and interact with it.
Upon receiving a UDP message, the server reads at most 1460 bytes into a local buffer and a pointer to the buffer is stored in a global variable:
#### Net Mask field stack overflow
The following code is vulnerable to a stack overflow that is attacker-controlled:
v6 = strlen(g_network_config->net_mask);
memcpy(&reply_buf[184], g_network_config->net_mask, v6);
DVRSearch is a service running by default on the IOBox listening for UDP messages on port 10001. Any user on the network can send messages to this service and interact with it.
Upon receiving a UDP message, the server reads at most 1460 bytes into a local buffer and a pointer to the buffer is stored in a global variable:
#### Net Mask field stack overflow
The following code is vulnerable to a stack overflow that is attacker-controlled:
v6 = strlen(g_network_config->net_mask);
memcpy(&reply_buf[184], g_network_config->net_mask, v6);
nvd CVSS3.1
10.0
Vulnerability type
CWE-121
Stack-based Buffer Overflow
Published: 24 Jun 2026 · Updated: 23 Jul 2026 · First seen: 24 Jun 2026