CVE-2026-81945 in PLANET IGS-5225-8P2T4S
Summary
by MITRE • 09/18/2026
PLANET IGS-5225-8P2T4S industrial managed switch V1 and V2 firmware versions bfore 1.2412b260707 and 2.2412b260519 contain a stack-based buffer overflow in the web server. Insufficient bounds checking on data copied into a stack buffer allows a remote administrator to cause a denial of service or potentially execute arbitrary code on the underlying operating system.
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Analysis
by VulDB Data Team • 09/18/2026
The PLANET IGS-5225-8P2T4S is an industrial managed switch designed for robust network infrastructure in demanding environments, yet its web-based management interface contains a critical security flaw that undermines the integrity of the device. Specifically, firmware versions prior to 1.2412b260707 and 2.2412b260519 are affected by a stack-based buffer overflow vulnerability within the embedded web server component. This type of vulnerability arises when the application copies data into a fixed-size buffer located on the call stack without performing adequate bounds checking to ensure that the input does not exceed the allocated memory space. In industrial control systems and critical infrastructure networks, such switches serve as central nodes for connectivity, making any compromise potentially catastrophic for operational continuity and network security posture.
From a technical perspective, this flaw is classified under CWE-121, which denotes stack-based buffer overflow. The vulnerability allows an attacker to overwrite adjacent memory locations on the stack, including critical control data such as return addresses or function pointers. When the compromised web server processes specially crafted HTTP requests containing oversized payloads, it fails to validate the length of the input against the destination buffer size. This lack of validation enables a remote administrator, who typically possesses elevated privileges due to their role in managing network devices, to manipulate the execution flow of the program. By carefully crafting the overflow payload, an attacker can redirect code execution to arbitrary shellcode injected into the memory space, thereby achieving remote code execution on the underlying operating system hosting the switch firmware.
The operational impact of this vulnerability is severe and multifaceted. The most immediate consequence is a denial of service condition, where the web server process crashes due to memory corruption, rendering the management interface inaccessible and potentially disrupting network monitoring capabilities for administrators relying on that specific access point. However, the more dangerous implication is the potential for arbitrary code execution. If successfully exploited, this flaw allows an attacker with administrative credentials to gain full control over the device's operating system. This level of compromise enables lateral movement within the industrial network, interception of sensitive traffic, modification of routing tables, and installation of persistent backdoors or malware such as Mirai variants that target IoT and OT devices. The presence of this vulnerability in a managed switch highlights significant gaps in secure coding practices during firmware development, particularly regarding input validation for web-facing services.
To mitigate the risks associated with CWE-121 and prevent exploitation via ATT&CK techniques related to initial access and privilege escalation, immediate action is required from network administrators. The primary remediation step is to upgrade the PLANET IGS-5225-8P2T4S firmware to version 1.2412b260707 or later for V1 devices, and version 2.2412b260519 or later for V2 devices, as these versions include patches that implement proper bounds checking in the web server's data handling routines. In environments where immediate patching is not feasible due to operational constraints, administrators should restrict access to the management interface using strict firewall rules, allowing only trusted IP addresses to communicate with the switch over HTTPS or SSH. Additionally, disabling unnecessary services and features within the web server can reduce the attack surface. Regular vulnerability assessments and penetration testing focused on embedded devices are recommended to identify similar flaws in other network infrastructure components before they can be exploited by malicious actors targeting industrial control systems.