CVE-2026-81944 in PLANET IGS-5225-8P2T4S
Summary
by MITRE • 09/18/2026
PLANET IGS-5225-8P2T4S industrial managed switch V1 and V2 firmware versions before 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 authenticated attacker 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 firmware versions prior to 1.2412b260707 and 2.2412b260519 contain a critical stack-based buffer overflow vulnerability within its embedded web server component. This flaw stems from insufficient bounds checking when processing data copied into fixed-size stack buffers, allowing an attacker to write beyond the allocated memory boundaries. The vulnerability is classified under CWE-121, which denotes a stack-based buffer overflow, and aligns with MITRE ATT&CK technique T1059, specifically command scripting or system commands execution via web server vulnerabilities.
The technical nature of this flaw involves improper validation of input length before copying data into memory locations on the call stack. In C programming languages commonly used in embedded systems, such as those found in industrial networking equipment, failure to verify that incoming data fits within the designated buffer size leads to overwriting adjacent memory structures. This can corrupt critical control flow information stored on the stack, including return addresses and frame pointers. An attacker exploiting this condition could redirect program execution to arbitrary code injected into the overflowed region or leverage existing executable modules in the system environment.
Operational impact of this vulnerability is severe due to its remote exploitable nature requiring only authenticated access. While authentication provides a baseline security control, many industrial deployments utilize default credentials or weak password policies that can be easily bypassed through credential stuffing or brute force attacks. Once an attacker gains valid session access, they can trigger the overflow via crafted HTTP requests directed at specific web server endpoints. The immediate consequence is often a denial of service as the device crashes due to memory corruption and subsequent process termination. However, with precise exploitation techniques involving shellcode injection or return-oriented programming chains, the attacker may achieve arbitrary code execution on the underlying operating system hosting the switch firmware.
This capability allows for complete compromise of the network infrastructure managed by the switch. An adversary could install persistent backdoors, intercept sensitive industrial control system traffic, pivot to other connected devices, or disrupt critical operations in manufacturing plants, power grids, or transportation networks where such switches are commonly deployed. The presence of this vulnerability highlights significant gaps in secure coding practices during firmware development, particularly regarding input validation and memory safety checks within web-facing services.
Mitigation strategies must prioritize immediate patching by upgrading to the fixed firmware versions 1.2412b260707 or 2.2412b260519 which address the bounds checking deficiency in the web server logic. In scenarios where updating is not immediately feasible, network segmentation should be enforced to restrict access to the management interface only from trusted administrative subnets. Additionally, implementing strict input filtering on any intermediate firewalls or proxies that inspect HTTP traffic can help block malformed requests containing oversized payloads before they reach the vulnerable device. Regular audits of user accounts and enforcement of strong password policies further reduce the attack surface by limiting opportunities for unauthorized authentication attempts that could precede exploitation of this buffer overflow flaw.