CVE-2021-47706
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: VulnCheck

Description
COMMAX Biometric Access Control System 1.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to access sensitive information and circumvent physical controls in smart homes and buildings by exploiting cookie poisoning. Attackers can forge cookies to bypass authentication and disclose sensitive information.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-06-16
AI Q&A
2025-12-10
EPSS Evaluated
2026-06-15
NVD
CVE-2021-47706
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
commax biometric_access_control_system 1.0.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-565 The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.
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Compliance Impact

The provided resources do not contain information regarding the impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Detection Guidance

This vulnerability can be detected by monitoring for unauthorized or forged cookies such as CMX_SAVED_ID, CMX_ADMIN_ID, CMX_ADMIN_NM, CMX_ADMIN_LV, CMX_COMPLEX_NM, and CMX_COMPLEX_IP being sent to the COMMAX Biometric Access Control System. One way to test is by sending crafted HTTP GET requests to endpoints like /db_dump.php and observing if sensitive information such as SQL backups is disclosed without proper authentication. For example, using curl to send a request with forged cookies: curl -v --cookie "CMX_ADMIN_ID=forged_value; CMX_ADMIN_LV=forged_value" http://<device_ip>/db_dump.php and checking the response for unauthorized data disclosure. [3]

Mitigation Strategies

Immediate mitigation steps include restricting network access to the COMMAX Biometric Access Control System devices to trusted users only, implementing network-level controls such as firewalls or VPNs to limit exposure, and monitoring for suspicious cookie activity. Since the vendor has not responded to disclosures, applying any available firmware updates or patches from COMMAX is recommended if released. Additionally, consider disabling remote access features until a fix is available and reviewing logs for signs of exploitation. [2, 4]

Executive Summary

This vulnerability in COMMAX Biometric Access Control System 1.0.0 allows unauthenticated attackers to bypass authentication by exploiting cookie poisoning. Attackers can forge cookies to gain unauthorized access to sensitive information and circumvent physical security controls in smart homes and buildings.

Impact Analysis

The vulnerability can allow attackers to access sensitive information without authentication and bypass physical security controls, potentially compromising the security of smart homes and buildings.

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