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

Summaryinfo

A vulnerability described as critical has been identified in GeoVision GV-IO Box 4E up to 2.09/2.11. The affected element is an unknown function of the component Send Message Handler. Executing a manipulation can lead to stack-based overflow. This vulnerability is handled as CVE-2026-12846. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in GeoVision GV-IO Box 4E up to 2.09/2.11 and classified as very critical. This vulnerability affects an unknown code block of the component Send Message Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is 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). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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);

The weakness was released by Philippe Laulheret. The advisory is available at geovision.com.tw. This vulnerability was named CVE-2026-12846 since 06/22/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of 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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