The vulnerability identified as CVE-2025-61976 affects the CHOCO TEI WATCHER mini (IB-MCT001), a device produced by Inaba Denki Sangyo Co., Ltd. It stems from an improper check for unusual or exceptional conditions within the device's Video Download interface. Specifically, when a remote attacker sends a specially crafted request to this interface, the device fails to handle the request correctly, leading to a state where it becomes unresponsive. This behavior indicates a denial-of-service (DoS) vulnerability that impacts the availability of the device. The vulnerability is exploitable remotely over the network without requiring any authentication or user interaction, making it highly accessible to attackers. The CVSS v3.0 score assigned is 7.5, reflecting a high severity level due to the network attack vector, low attack complexity, no privileges required, and no user interaction needed, with a significant impact on availability but no impact on confidentiality or integrity. The vulnerability affects all versions of the product, indicating a widespread exposure. Although no public exploits are currently known, the nature of the flaw suggests that exploitation could disrupt critical video monitoring functions, potentially impacting operational continuity. The lack of available patches at the time of publication necessitates immediate risk mitigation through network controls and monitoring. The device is likely used in industrial or specialized monitoring contexts, where availability is critical. The improper handling of exceptional conditions suggests a flaw in input validation or error handling logic within the device's firmware or software stack.

For European organizations, the primary impact of CVE-2025-61976 is the potential denial of service of the CHOCO TEI WATCHER mini devices, which may be used in video surveillance, industrial monitoring, or IoT environments. Disruption of these devices could lead to loss of video monitoring capabilities, impacting security operations and situational awareness. In critical infrastructure sectors such as manufacturing, utilities, or transportation where such devices might be deployed, this could result in operational downtime or delayed incident response. The lack of confidentiality or integrity impact limits data breach concerns, but availability loss can have cascading effects on safety and compliance with regulatory requirements such as GDPR if monitoring is essential for security controls. The ease of remote exploitation without authentication increases the risk of widespread attacks, especially if these devices are exposed to untrusted networks. European organizations with limited network segmentation or outdated device inventories may be particularly vulnerable. The absence of known exploits currently reduces immediate risk but does not preclude future exploitation. The operational impact could be severe in environments relying heavily on continuous video feeds for security or process monitoring.

1. Network Segmentation: Isolate CHOCO TEI WATCHER mini devices on dedicated network segments with strict access controls to limit exposure to untrusted networks. 2. Access Controls: Restrict access to the Video Download interface to trusted IP addresses or VPNs only, preventing unauthorized remote requests. 3. Monitoring and Detection: Implement network monitoring to detect unusual or malformed requests targeting the Video Download interface, enabling early detection of exploitation attempts. 4. Firmware Updates: Engage with Inaba Denki Sangyo Co., Ltd. for timely patches or firmware updates addressing this vulnerability and apply them as soon as they become available. 5. Device Inventory and Risk Assessment: Maintain an accurate inventory of all deployed CHOCO TEI WATCHER mini devices and assess their criticality to prioritize mitigation efforts. 6. Incident Response Planning: Prepare response procedures for potential denial-of-service incidents affecting these devices to minimize operational disruption. 7. Network-level Protections: Deploy intrusion prevention systems (IPS) or web application firewalls (WAF) capable of blocking or alerting on suspicious traffic patterns targeting the vulnerable interface. 8. Vendor Communication: Maintain active communication channels with the vendor for updates and guidance on vulnerability remediation.