CVE-2026-66271 in Wyse Management Suite
Summary
by MITRE • 08/14/2026
Dell Wyse Management Suite (WMS), versions prior to 2605.0.2, contain an Unrestricted Upload of File with Dangerous Type vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Remote Code Execution.
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Analysis
by VulDB Data Team • 08/14/2026
The Dell Wyse Management Suite represents a comprehensive endpoint management platform designed for organizations to manage and monitor their thin client devices. This suite provides centralized administration capabilities for Wyse thin clients, enabling IT administrators to deploy configurations, manage software updates, and monitor device health across enterprise environments. The platform's architecture includes web-based management interfaces that facilitate remote administration and device provisioning through standardized protocols and APIs.
This vulnerability resides within the file upload functionality of the WMS platform, specifically in versions prior to 2605.0.2. The flaw manifests as an unrestricted file upload mechanism that fails to properly validate file types during the upload process. A malicious actor with high privileged access and remote connectivity can exploit this weakness by uploading specially crafted files that bypass security checks. The vulnerability is classified under CWE-434, which specifically addresses unrestricted file upload vulnerabilities where applications accept potentially dangerous file types without proper validation.
The operational impact of this vulnerability extends beyond simple data compromise, as it enables full remote code execution capabilities for authenticated attackers. When an attacker successfully uploads a malicious file through the vulnerable upload mechanism, they can execute arbitrary code on the target system with the privileges of the web application. This represents a critical escalation from mere privilege abuse to complete system compromise, allowing attackers to establish persistent access, exfiltrate sensitive data, or deploy additional malware within the enterprise network.
The security implications are particularly severe given that the vulnerability requires only high privileged access, which suggests that the attacker already possesses legitimate administrative credentials or has successfully authenticated through other means. This scenario commonly occurs in environments where privilege escalation attacks have been successful or where credential theft techniques such as phishing, credential reuse, or lateral movement have been employed. The ATT&CK framework categorizes this vulnerability under T1566 for credential harvesting and T1059 for command and script injection, highlighting the multi-stage attack pattern that leverages both authentication bypass and execution capabilities.
Organizations should immediately implement mitigations including immediate patching to version 2605.0.2 or later, which addresses the file validation flaw through enhanced input sanitization and strict type checking mechanisms. Network segmentation and access controls should be reinforced to limit exposure of management interfaces to trusted networks only. Additionally, implementing web application firewalls with custom rules to detect and block suspicious upload patterns can provide additional defense layers. Regular security assessments and penetration testing should be conducted to verify the effectiveness of implemented controls and identify potential additional vulnerabilities within the platform's attack surface.
The vulnerability underscores the critical importance of proper input validation in web applications and demonstrates how seemingly minor oversights in file handling can create catastrophic security implications. Organizations must maintain robust patch management processes and conduct regular security reviews of their endpoint management platforms to prevent similar vulnerabilities from being exploited in production environments. The incident also highlights the necessity of principle of least privilege implementation, where administrative access is strictly controlled and monitored to minimize potential damage from compromised credentials.