CVE-2026-66270 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 management platform for deploying and managing thin client devices in enterprise environments. This vulnerability exists within the file upload functionality of WMS versions prior to 2605.0.2, creating a critical security gap that allows malicious actors to bypass normal file validation mechanisms. The flaw specifically manifests as an unrestricted file upload vulnerability classified under CWE-434, where the system fails to properly validate or restrict file types during the upload process. Attackers with high privileged access can leverage this weakness by uploading malicious files such as executable binaries, scripts, or web shells that can be executed within the context of the WMS application.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the file handling components of the WMS platform. When legitimate users upload files through the management interface, the system should enforce strict type checking and content verification to prevent dangerous file formats from being stored or executed. However, in vulnerable versions, the application accepts uploads without proper restrictions on file extensions, MIME types, or content signatures, allowing attackers to bypass these security controls entirely. This weakness creates a direct pathway for remote code execution as the uploaded files can be subsequently accessed and executed by the web server or application processes.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with persistent access to the management infrastructure that controls numerous thin client devices across enterprise networks. Once successfully exploited, an attacker could gain administrative control over the WMS platform and subsequently manipulate or compromise all managed devices within the organization's network. This includes potential data exfiltration from endpoint devices, deployment of malicious payloads on target systems, and establishment of persistent backdoors for continued access. The attack surface is particularly concerning given that thin client management platforms typically operate in trusted network segments where security controls may be less stringent than those at the perimeter.
Organizations should immediately implement several mitigation strategies to address this vulnerability including immediate patching to version 2605.0.2 or later, which includes enhanced file validation and upload restrictions. Network segmentation should be enforced to limit access to WMS management interfaces, while implementing strict firewall rules that restrict remote access to only authorized administrative personnel. Additionally, security monitoring solutions should be configured to detect unusual file upload activities within the WMS environment, with logging enabled for all file operations. The ATT&CK framework categorizes this vulnerability under T1190 for exploit public-facing application and T1059 for command and scripting interpreter, highlighting the multi-stage nature of potential attacks that could leverage this weakness for broader system compromise.