CVE-2021-47708: COMMAX Smart Home IoT Control System SQL Injection Authentication Bypass

Severity: critical (CVSS 9.3 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-09 · updated 2026-06-17
Weakness: CWE-89

Description

COMMAX Smart Home System CDP-1020n contains an SQL injection vulnerability that allows attackers to bypass authentication by injecting arbitrary SQL code through the 'id' parameter in 'loginstart.asp'. Attackers can exploit this by sending a POST request with malicious 'id' values to manipulate database queries and gain unauthorized access.

Affected products

COMMAX Co., Ltd. Smart Home IoT Control System: CDP-1020n, 481 System

References

https://github.com/zeroscience
https://www.commax.com
https://www.exploit-db.com/exploits/50207
https://www.vulncheck.com/advisories/commax-smart-home-iot-control-system-sql-injection-authentication-bypass
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5662.php

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