GeoVision GV-IO Box 4E up to 2.09/2.11 Send Message stack-based overflow

Summaryinfo

A vulnerability classified as critical has been found in GeoVision GV-IO Box 4E up to 2.09/2.11. The impacted element is an unknown function of the component Send Message Handler. The manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-12847. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in GeoVision GV-IO Box 4E up to 2.09/2.11 and classified as very critical. This issue affects some unknown processing of the component Send Message Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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);

The weakness was disclosed by Philippe Laulheret. It is possible to read the advisory at geovision.com.tw. The identification of this vulnerability is CVE-2026-12847 since 06/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/24/2026).

Upgrading to version 2.12 eliminates this vulnerability.

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Productinfo

Vendor

• GeoVision

Name

• GV-IO Box 4E

Version

• 2.0
• 2.09
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11

CPE 2.3info

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CPE 2.2info

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Entryinfo

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