CVE-2025-11004 identifies a reflected Cross-site Scripting (XSS) vulnerability in the Simplicity Device Manager tool developed by Silabs. This vulnerability arises from improper neutralization of input during web page generation (CWE-79), allowing malicious scripts to be injected and executed in the context of the victim's browser. The affected components are several API endpoints that do not adequately sanitize user-supplied input before reflecting it in HTTP responses. An attacker must be on the same network as the target system to exploit this vulnerability, which requires user interaction to trigger the malicious payload. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but user interaction is necessary (UI:A). The impact on confidentiality, integrity, and availability is high (C:H, I:H, A:H), meaning that successful exploitation can lead to theft or manipulation of sensitive data, session hijacking, or disruption of service. The vulnerability affects all versions listed as '0' (likely indicating initial or unspecified versions) of the Simplicity Device Manager tool. No patches or known exploits are currently available, but the risk is significant given the tool's role in managing IoT and embedded devices. The vulnerability is particularly concerning for environments where the device manager is accessible within local networks, such as corporate or industrial settings.

For European organizations, the impact of CVE-2025-11004 can be substantial, especially those relying on Silabs Simplicity Device Manager for managing IoT devices, embedded systems, or industrial control systems. Exploitation could lead to unauthorized access to device management interfaces, allowing attackers to steal sensitive configuration data, manipulate device settings, or disrupt device availability. This can compromise operational technology environments, leading to potential downtime, data breaches, or safety risks. Confidentiality breaches could expose intellectual property or personal data, violating GDPR requirements and resulting in regulatory penalties. Integrity attacks could alter device behavior, causing malfunctions or unsafe conditions. Availability impacts could disrupt critical infrastructure or business operations. The requirement for network proximity limits remote exploitation but does not eliminate risk in environments with shared or poorly segmented networks. The lack of patches increases the urgency for interim mitigations. Given the increasing adoption of IoT and embedded systems in European industries such as manufacturing, energy, and transportation, the threat is relevant and warrants proactive defense measures.

1. Implement strict network segmentation to isolate systems running Simplicity Device Manager from general user networks, reducing attacker access to the same network. 2. Restrict API endpoint access using firewall rules, VPNs, or zero-trust network architectures to limit exposure only to authorized management stations. 3. Employ web application firewalls (WAFs) with custom rules to detect and block reflected XSS attack patterns targeting the affected APIs. 4. Enforce strong input validation and output encoding on all user-supplied data within the Simplicity Device Manager environment, if customization is possible. 5. Monitor network traffic and logs for unusual API requests or repeated failed attempts that could indicate exploitation attempts. 6. Educate users about the risks of interacting with suspicious links or payloads while on the same network as the device manager. 7. Coordinate with Silabs for timely patch deployment once available and apply updates promptly. 8. Consider deploying endpoint protection solutions that can detect and block malicious scripts or browser-based attacks. 9. Review and tighten authentication and authorization controls for the Simplicity Device Manager to minimize impact if exploitation occurs. 10. Conduct regular security assessments and penetration tests focusing on the device management infrastructure to identify and remediate weaknesses.