CVE-2026-82791 in CAN-2-WF
Summary
by MITRE • 09/14/2026
Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in Contec CAN 2.0B Communication Wireless LAN / USB Converter Unit. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker who can log in to the product.
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Analysis
by VulDB Data Team • 09/14/2026
The identified security flaw represents a classic instance of Operating System Command Injection within the Contec CAN 2.0B Communication Wireless LAN and USB Converter Unit. This vulnerability stems from improper neutralization of special elements used in OS commands, which allows an attacker to inject arbitrary shell metacharacters into input fields that are subsequently passed directly to system-level command interpreters without adequate sanitization or validation. The core technical deficiency lies in the application's failure to properly escape or filter user-supplied data before constructing and executing operating system commands. This lack of rigorous input validation means that any special characters, such as semicolons, pipes, ampersands, or backticks, included by a malicious actor can terminate the intended command sequence and initiate new, unauthorized commands within the host environment.
The operational impact of this vulnerability is severe due to its potential for remote code execution at the operating system level. Although exploitation requires an attacker who has already authenticated to the product, the consequence of successful authentication combined with this flaw results in a complete compromise of device integrity. An adversary can execute arbitrary commands with the privileges associated with the application process running on the converter unit. This could lead to unauthorized data access, modification or destruction of system files, installation of persistent backdoors, and potentially using the compromised device as a pivot point for further attacks against other systems within the network segment where the converter is deployed. The severity is amplified by the fact that such devices often serve critical infrastructure roles in industrial control systems or enterprise networks, making them high-value targets once initial access is gained.
From a classification perspective, this vulnerability aligns with CWE-78, which defines Improper Neutralization of Special Elements used in an OS Command, commonly known as OS Command Injection. In the context of the MITRE ATT&CK framework, this flaw facilitates techniques associated with Execution and Persistence, specifically allowing attackers to leverage command-line interfaces for arbitrary execution. The attack vector typically involves manipulating input parameters that are directly concatenated into system calls or shell commands without employing allow-listing strategies or parameterized approaches that separate code from data.
Mitigation of this vulnerability requires a multi-layered approach focusing on secure coding practices and configuration hardening. Developers must implement strict input validation using an allow-list strategy, ensuring that only expected character sets are accepted for all user inputs. Any special characters required by the application logic should be escaped or encoded appropriately before being passed to OS commands. Furthermore, minimizing the privileges of the process running the converter unit can limit the blast radius if exploitation occurs. Network-level controls such as firewalls and intrusion detection systems should also be configured to monitor for anomalous command execution patterns originating from these devices. Regular security audits and penetration testing are essential to identify similar injection points in firmware updates or configuration interfaces, ensuring that future iterations of the software adhere to secure development lifecycle standards.