The vulnerability identified as CVE-2025-15113 affects Ksenia Security Lares 4.0 Home Automation versions 1.6 and 1.0.0.15. It stems from an unprotected endpoint that permits attackers to upload MPFS File System binary images without authentication. MPFS (Microchip File System) binary images are used to store firmware or web server content on embedded devices. By uploading a malicious binary image, an attacker can overwrite the device's flash program memory, effectively replacing or modifying the firmware or web server files. This leads to arbitrary code execution on the device, granting the attacker full control over the home automation system's web server. The vulnerability does not require any privileges or user interaction, making it highly exploitable. The CVSS 3.1 base score of 9.3 reflects critical severity, with attack vector local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), scope changed (S:C), and high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). The vulnerability was published on December 30, 2025, with no known exploits in the wild yet. This flaw could allow attackers to manipulate home automation controls, exfiltrate sensitive data, or disrupt services, posing significant risks to users relying on these systems for security and convenience.

For European organizations, the impact of this vulnerability is significant, especially for those deploying Ksenia Security Lares 4.0 in residential, commercial, or critical infrastructure environments. Compromise of the home automation system could lead to unauthorized physical access, disruption of security systems, privacy violations through data theft, and potential pivoting to other internal networks. The ability to execute arbitrary code on the device can enable persistent backdoors or malware installation, undermining trust in smart building technologies. Given the critical nature of the vulnerability and the lack of authentication requirements, attackers could exploit this flaw remotely if they gain local network access, such as through compromised Wi-Fi or VPN connections. This elevates risks for organizations with insufficient network segmentation or weak perimeter defenses. Additionally, disruption or manipulation of home automation systems could have safety implications, such as disabling alarms or controlling entry points, which is particularly concerning for sensitive facilities.

Immediate mitigation involves applying vendor patches or firmware updates once released by Ksenia Security S.p.A. In the absence of patches, organizations should implement strict network segmentation to isolate home automation devices from critical IT infrastructure and limit access to trusted users only. Deploy network monitoring tools to detect unusual upload attempts or changes in device behavior. Disable or restrict access to the vulnerable endpoint if possible through device configuration or firewall rules. Employ strong authentication and authorization mechanisms on the network level, such as VPNs with multi-factor authentication, to reduce the risk of unauthorized local access. Regularly audit and inventory smart devices to ensure timely identification of vulnerable versions. Educate users and administrators about the risks of exposing home automation systems to untrusted networks. Finally, consider deploying intrusion detection/prevention systems (IDS/IPS) tailored to detect anomalous MPFS image uploads or firmware modifications.