# CVE-2026-12847: GeoVision GV-I/O Box 4E stack overflow in DVRSearch gateway field

Source: https://junglewise.ai/threats/cve-2026-12847-geovision-gv-i-o-box-4e-stack-overflow-in-dvrsearch-gateway-field  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-24. Updated: 2026-06-24  
License: CC BY 4.0 with a link back

CVE-2026-12847 · Severity: critical · CVSS 10 · Published 2026-06-24

The GeoVision GV-I/O Box 4E, an industrial controller used to manage physical inputs and relays over a network, contains a critical security flaw. An attacker can send a specially crafted network message to the device's discovery service to take complete control of the hardware. This could allow unauthorized parties to manipulate physical equipment, disrupt operations, or gain a foothold in the corporate network.

Technologies: [Geovision GV-I/O Box 4E](https://junglewise.ai/threats/technologies/gv-i-o-box-4e). Vendors: [Geovision](https://junglewise.ai/threats/vendors/geovision).

## Quick answers

**Is CVE-2026-12847 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12847 being exploited in the wild.

**How severe is CVE-2026-12847?** Critical severity, with a CVSS score of 10, published 24 June 2026.

**Which products and versions are affected?** Geovision GV-I/O Box 4E 2.09.

**Is there a fix for CVE-2026-12847?** A patch was published on 2026-04-28: Vendor released firmware version 2.12 to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-12847 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-12847?** Check whether you run Geovision GV-I/O Box 4E at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow (CWE-121) exists in the DVRSearch service of GeoVision GV-I/O Box 4E firmware version 2.09. The service listens for UDP messages on port 10001. When processing the CMD_IP_SET command, the application fails to validate the length of the 'gateway' field before copying it into a fixed-size local buffer using memcpy. An unauthenticated attacker on the network can send a crafted UDP packet to overflow the stack, leading to arbitrary code execution with root privileges. This is one of several similar overflows (including IP, Net Mask, and DNS fields) identified in the same component. A patch was released in version 2.12.

## Affected products

- GeoVision Inc. GV-I/O Box 4E 2.09

## Timeline

- 2026-04-21: disclosed: Initial vendor contact and disclosure by Cisco Talos
- 2026-04-28: patched: Vendor released firmware version 2.12 to address the issue
- 2026-06-24: advisory: Public advisory and CVE publication

## References

- [https://talosintelligence.com/vulnerability_reports/TALOS-2026-2377](https://talosintelligence.com/vulnerability_reports/TALOS-2026-2377)
- [https://www.geovision.com.tw/cyber_security.php](https://www.geovision.com.tw/cyber_security.php)

## Related threats

- [GeoVision GV-I/O Box 4E command injection in libNetSetObj.so](https://junglewise.ai/threats/cve-2026-12851-geovision-gv-i-o-box-4e-command-injection-in-libnetsetobj-so)
- [GeoVision GV-I/O Box 4E command injection in libNetSetObj.so](https://junglewise.ai/threats/cve-2026-12850-geovision-gv-i-o-box-4e-command-injection-in-libnetsetobj-so)
- [GeoVision GV-I/O Box 4E command injection in libNetSetObj.so](https://junglewise.ai/threats/cve-2026-12849-geovision-gv-i-o-box-4e-command-injection-in-libnetsetobj-so)
- [GeoVision GV-I/O Box 4E stack overflow in DVRSearch DNS field](https://junglewise.ai/threats/cve-2026-12848-geovision-gv-i-o-box-4e-stack-overflow-in-dvrsearch-dns-field)
- [GeoVision GV-I/O Box 4E stack overflow in DVRSearch net_mask field](https://junglewise.ai/threats/cve-2026-12846-geovision-gv-i-o-box-4e-stack-overflow-in-dvrsearch-net-mask)