CVE-2026-100737
Deferred Deferred - Pending Action

Unauthorized Firmware Upgrade in Atsumi Electric DVRs

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: JPCERT/CC

Description
Hidden functionality issue exists in Multiple DVRs (Digital Video Recorders) provided by Atsumi Electric Co., Ltd. A user who can log in to the product with the administrator privilege may upgrade the affected product to unauthorized firmware.

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Meta Information

Published
2026-10-20
Last Modified
2026-10-20
Generated
2026-11-10
AI Q&A
2026-10-20
EPSS Evaluated
2026-11-08
NVD
CVE-2026-100737
EUVD
EUVD-2026-104797

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-912 The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators.

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Executive Summary

This vulnerability is a hidden functionality issue in Atsumi Electric Co., Ltd.'s ADX series DVRs. It allows an attacker with administrator access to perform unauthorized firmware upgrades or execute arbitrary OS commands. This could lead to data manipulation, malware infection, or using the device for further attacks.

Detection Guidance

To detect this vulnerability, check the firmware version of your Atsumi Electric ADX series DVR. Affected models include ADX5004, ADX5008, ADX404, ADX3004, ADX3008, ADX3016, ADX204 (prior to 10.8.237) and all versions of ADX1004, ADX1008, ADX2016. Use the device's web interface or SSH to verify the firmware version.

Impact Analysis

If exploited, this vulnerability could allow attackers to manipulate or destroy data, leak sensitive information, infect the device with malware, or use it as a platform to launch additional cyberattacks. Unauthorized firmware upgrades could also make the device inoperable or turn it into a tool for malicious activities.

Compliance Impact

This vulnerability could lead to data breaches, which may violate GDPR and HIPAA requirements for data protection and confidentiality. Unauthorized access and data manipulation could result in non-compliance, legal penalties, and reputational damage for organizations handling sensitive data.

Mitigation Strategies

Upgrade firmware to version 10.8.237 for supported models (ADX5004, ADX5008, ADX404, ADX3004, ADX3008, ADX3016, ADX204). For unsupported models (ADX1004, ADX1008, ADX2016), either disconnect from the network or replace with newer models like ADX5000 series.

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