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

Summaryinfo

A vulnerability classified as critical was found in GeoVision GV-IO Box 4E up to 2.09/2.11. This affects an unknown function of the component Send Message Handler. The manipulation results in stack-based overflow. This vulnerability was named CVE-2026-12848. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in GeoVision GV-IO Box 4E up to 2.09/2.11. It has been classified as very critical. Affected is an unknown function of the component Send Message Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as 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). This is going to have an impact on 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: #### DNS field stack overflow The following code is vulnerable to a stack overflow that is attacker-controlled: v8 = strlen(g_network_config->dns_addr); memcpy(&reply_buf[248], g_network_config->dns_addr, v8);

The weakness was presented by Philippe Laulheret. The advisory is shared for download at geovision.com.tw. This vulnerability is traded as CVE-2026-12848 since 06/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/24/2026).

Upgrading to version 2.12 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38649). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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