CVE-2025-26331 in Wyse Proprietary OS
Summary
by MITRE • 03/07/2025
Dell ThinOS 2411 and prior, contains an Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to arbitrary code execution.
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Analysis
by VulDB Data Team • 07/02/2025
The vulnerability identified as CVE-2025-26331 resides within Dell ThinOS version 2411 and earlier releases, representing a critical command injection flaw that undermines the security posture of thin client environments. This vulnerability falls under the Common Weakness Enumeration category CWE-77, which specifically addresses improper neutralization of special elements used in commands. The flaw manifests when the operating system fails to adequately sanitize user inputs before incorporating them into system commands, creating an avenue for malicious actors to execute unauthorized code. The vulnerability is particularly concerning in thin client deployments where Dell ThinOS serves as the primary operating environment for enterprise users, making it a prime target for attackers seeking to compromise corporate networks through these endpoints.
The technical implementation of this command injection vulnerability allows a low privileged attacker with local access to manipulate system commands through specially crafted inputs that are not properly validated or escaped. When the ThinOS operating system processes user-supplied data within command execution contexts, it fails to implement adequate input sanitization measures, enabling attackers to inject malicious commands that bypass normal security controls. This weakness can be exploited through various attack vectors including but not limited to file uploads, configuration parameter manipulation, or direct input fields that feed into system command invocations. The vulnerability's impact is amplified by the fact that it requires minimal privileges to exploit, making it accessible to users who have already gained local access to the thin client device, potentially through legitimate means such as employee login credentials or physical access.
The operational consequences of this vulnerability extend beyond simple code execution, as it can lead to complete system compromise of Dell ThinOS devices within enterprise environments. Attackers who successfully exploit this vulnerability can gain unauthorized access to sensitive corporate data, potentially escalate privileges to administrative levels, and establish persistent backdoors for continued access. The thin client architecture, which is designed to minimize local storage and processing capabilities while centralizing data management, becomes a critical point of failure when such vulnerabilities exist. This creates a significant risk for organizations relying on Dell ThinOS for their endpoint security, as a single compromised device can serve as a foothold for broader network infiltration. The vulnerability also impacts the integrity of the overall security infrastructure, as thin clients often serve as the first line of defense in enterprise security policies.
Organizations should implement immediate mitigations including applying the latest security patches from Dell, which address the command injection vulnerability through proper input validation and sanitization mechanisms. Network segmentation strategies should be reinforced to limit the potential lateral movement of attackers who might compromise individual thin client devices, while monitoring systems should be enhanced to detect anomalous command execution patterns. Access controls must be reviewed and strengthened to ensure that only authorized personnel have local access to thin client devices, and multi-factor authentication should be implemented where possible. Additionally, security awareness training for employees should emphasize the importance of physical security controls and the risks associated with unauthorized local access to corporate devices. The remediation process should also include comprehensive vulnerability assessments to identify other potential command injection vulnerabilities within the broader enterprise environment, as this type of weakness often indicates broader architectural issues that may affect other systems and applications.