CVE-2026-24348 is a vulnerability identified in the EZCast Pro II product, specifically version 1.17478.146, involving multiple cross-site scripting (XSS) flaws within its administrative user interface. The root cause is improper input validation (CWE-20), which allows malicious actors to inject arbitrary JavaScript code that executes in the context of other Admin UI users' browsers. This can lead to session hijacking, credential theft, or unauthorized administrative actions. The vulnerability has a CVSS 4.0 base score of 7.4, indicating high severity, with an attack vector classified as adjacent network (AV:A), high attack complexity (AC:H), no privileges required (PR:N), and user interaction required (UI:P). The impact on confidentiality and integrity is high, while availability impact is none. No authentication is needed to exploit, but the attacker must trick an Admin UI user into interacting with the malicious payload. No known exploits have been reported in the wild, and no official patches or updates have been released at the time of publication. The vulnerability was reserved and published by NCSC.ch, indicating credible and authoritative reporting. The absence of patch links suggests that organizations must rely on mitigation strategies until a fix is available. The Admin UI is a critical component, and compromise here can lead to significant operational and security risks.

For European organizations, the impact of this vulnerability can be significant, especially for those deploying EZCast Pro II in corporate, educational, or governmental environments where the Admin UI is accessed by multiple administrators. Successful exploitation can lead to unauthorized access to administrative functions, data leakage, and potential lateral movement within the network. Confidentiality is at risk due to possible session hijacking and exposure of sensitive administrative data. Integrity can be compromised if attackers execute unauthorized commands or alter configurations. Although availability is not directly impacted, the indirect effects of compromised administrative control can disrupt operations. The requirement for user interaction limits mass exploitation but targeted attacks against high-value administrators remain a concern. The lack of patches increases the window of exposure, necessitating immediate compensating controls. Organizations handling sensitive or regulated data must prioritize addressing this vulnerability to maintain compliance and security posture.

1. Restrict access to the Admin UI to trusted networks and users only, using network segmentation and VPNs where possible. 2. Implement strict input validation and sanitization on all user inputs within the Admin UI, employing Content Security Policy (CSP) headers to limit script execution. 3. Educate administrators about phishing and social engineering risks to reduce the likelihood of user interaction with malicious payloads. 4. Monitor Admin UI access logs and network traffic for unusual patterns indicative of exploitation attempts. 5. Employ multi-factor authentication (MFA) for Admin UI access to add an additional security layer, even though the vulnerability does not require authentication. 6. Regularly back up configuration and administrative data to enable recovery in case of compromise. 7. Engage with EZCast support channels to obtain updates on patches or workarounds and apply them promptly once available. 8. Consider deploying web application firewalls (WAFs) with custom rules to detect and block XSS attack vectors targeting the Admin UI. 9. Limit the number of users with Admin UI access to the minimum necessary to reduce the attack surface.