Executive Summary

CVE-2025-66357 is a vulnerability in the CHOCO TEI WATCHER mini (IB-MCT001) where the Video Download feature, when in a specific communication state, causes abnormal consumption of the product's resources. This happens due to an improper check for unusual or exceptional conditions, which can lead to communication delays and an infinite loop of error file downloads. [1, 2]

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Impact Analysis

This vulnerability can cause the device to consume resources abnormally, potentially leading to system unresponsiveness or degraded performance. Remote attackers can exploit this by sending crafted requests to the Video Download interface, causing communication delays and infinite error loops, which may disrupt normal device operation. [1, 2]

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Mitigation Strategies

Immediate mitigation steps include restricting the use of the CHOCO TEI WATCHER mini device to trusted LAN environments, limiting access from untrusted networks or hosts, employing firewalls or Virtual Private Networks (VPNs) to prevent unauthorized access when connecting the device to the internet, and minimizing the scope of internet exposure. Users should also refer to the product manual for detailed configuration changes. [1, 2]

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Detection Guidance

The vulnerability CVE-2025-66357 involves abnormal resource consumption when the Video Download feature is in a specific communication state, causing communication delays and an infinite loop of error file downloads. Detection can focus on monitoring unusual network traffic patterns related to the Video Download feature, such as repeated or looping download requests causing high resource usage. Since the vulnerability is triggered remotely via crafted requests to the Video Download interface, network monitoring tools could be used to detect abnormal repeated requests or communication delays. Specific commands are not provided in the available resources. Recommended mitigation includes restricting device use to trusted LAN environments, limiting access from untrusted networks, and using firewalls or VPNs to prevent unauthorized access. [1, 2]

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