CVE-2026-23858 is a cross-site scripting (XSS) vulnerability classified under CWE-79, found in Dell Wyse Management Suite versions prior to 5.5. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows an attacker to inject malicious scripts into the web interface. The attacker requires low privileges and remote access to the management suite but must also rely on user interaction to trigger the malicious script execution. The vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), low privileges required (PR:L), user interaction required (UI:R), and scope changed (S:C). The impact affects confidentiality and integrity to a limited extent but does not affect availability. Exploitation could lead to session hijacking, unauthorized actions on behalf of users, or further exploitation through script injection. No public exploits or active exploitation in the wild have been reported to date. The vulnerability affects organizations using Dell Wyse Management Suite for managing endpoint devices, which is commonly deployed in enterprise and government environments for centralized device management. The lack of patches at the time of reporting necessitates interim mitigations to reduce risk.

The vulnerability could allow attackers to execute arbitrary scripts in the context of the affected web application, potentially leading to session hijacking, theft of sensitive information, or unauthorized actions performed with the privileges of the victim user. While the impact on availability is negligible, the confidentiality and integrity of user sessions and data could be compromised. This poses a risk to organizations relying on Dell Wyse Management Suite for endpoint management, especially those with sensitive or critical infrastructure. Attackers with low privileges and remote access could leverage this vulnerability to escalate their foothold or move laterally within networks. The requirement for user interaction somewhat limits the ease of exploitation but does not eliminate the risk, particularly in environments where users frequently access the management console. The absence of known exploits reduces immediate risk but does not preclude future exploitation attempts.

Organizations should prioritize upgrading Dell Wyse Management Suite to version 5.5 or later once patches are released by Dell. Until patches are available, administrators should restrict access to the management interface using network segmentation, VPNs, or IP whitelisting to limit exposure to trusted users only. Implementing web application firewalls (WAFs) with rules to detect and block XSS payloads can provide additional protection. Enforce strict input validation and output encoding on any custom integrations or scripts interacting with the management suite to reduce injection risks. Educate users about the risks of interacting with suspicious links or content within the management console. Regularly monitor logs for unusual activity that may indicate attempted exploitation. Finally, maintain an incident response plan to quickly address any suspected compromise related to this vulnerability.