CRITICAL: CVE-2026-12847 (CVSS 10) — multiple products

CVE: CVE-2026-12847

CVSS: 10 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

_See vendor advisory_

Summary

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:

#### Gateway field stack overflow

The following code is vulnerable to a stack overflow that is attacker-controlled:

v7 = strlen(g_network_config->gateway);

memcpy(&reply_buf[216], g_network_config->gateway, v7);

Verified Sources

• NVD entry
• GitHub Advisory
• MITRE

References

• https://talosintelligence.com/vulnerability_reports/TALOS-2026-2377
• https://www.geovision.com.tw/cyber_security.php

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._