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Fencer Intel
critical 10.0

CVE-2026-12846 json

GeoVision GV-I/O Box DVRSearch buffer overflow vulnerabilities in CMD_IP_SET command

published 4mo ago modified 15d ago also EUVD-2026-38647

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

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:

#### 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);

Patch / fix

  • GeoVision Inc. GV-I/O Box 4E v2.12

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • GeoVision Inc. GV-I/O Box 4E

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.