CVE-2026-22766 in Wyse Management Suite
Summary
by MITRE • 02/24/2026
Dell Wyse Management Suite, versions prior to WMS 5.5, 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 execution.
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Analysis
by VulDB Data Team • 02/28/2026
The vulnerability identified as CVE-2026-22766 affects Dell Wyse Management Suite versions prior to WMS 5.5 and represents a critical security flaw categorized under CWE-434 Unrestricted Upload of File with Dangerous Type. This vulnerability arises from insufficient validation of file uploads within the management interface, allowing authenticated attackers with high privileges to bypass security controls and upload malicious files to the system. The flaw exists in the file handling mechanisms that fail to properly validate file extensions, content types, or file signatures before processing uploads, creating a pathway for arbitrary code execution.
The technical implementation of this vulnerability stems from the absence of proper input validation and sanitization within the file upload functionality of the Wyse Management Suite. Attackers can exploit this weakness by uploading files with dangerous extensions such as .jsp, .php, .asp, or .exe that can be executed within the application context. The vulnerability is particularly concerning because it requires only high-privileged access rather than administrative credentials, making it accessible to attackers who have already gained some level of system access. This aligns with ATT&CK technique T1190 for Exploit Public-Facing Application, where attackers leverage vulnerabilities in externally accessible systems to gain unauthorized access.
The operational impact of this vulnerability extends beyond simple remote code execution, as it can enable attackers to establish persistent access, escalate privileges, and potentially compromise the entire management infrastructure. The Wyse Management Suite typically handles critical device management functions for thin clients and other endpoint devices, making the compromise of this system a severe threat to overall network security. Successful exploitation could allow attackers to deploy malware, create backdoors, or use the compromised system as a pivot point for attacking other network segments. The vulnerability's potential for remote execution means that attackers could operate entirely from external networks without requiring physical access to the managed devices.
Organizations should immediately implement mitigations including upgrading to Dell Wyse Management Suite version 5.5 or later, which includes proper file validation and sanitization controls. Network segmentation should be enforced to limit access to management interfaces, and strict access controls should be implemented to ensure only authorized personnel can upload files. Additionally, implementing web application firewalls and monitoring for suspicious file upload activities can help detect potential exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and the principle of least privilege in security design, as outlined in defense-in-depth strategies recommended by NIST SP 800-53. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other management systems and prevent similar exploitation scenarios.