CVE-2021-47708 CRITICAL

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

Vendor Commax Co., Ltd.
Product Smart Home IoT Control System
Weakness CWE-89 · SQLi
Published December 9, 2025
Last update April 7, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 9, 2025 CVE published
April 7, 2026 Record updated