Vulnerability · Published Dec 9, 2025 · Assigned by VulnCheck

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

Critical 9.3

In plain English

A critical-severity SQL injection in Smart Home IoT Control System from COMMAX Co., Ltd.. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.5%top 55.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
COMMAX Co., Ltd.	Smart Home IoT Control System	CDP-1020n481 System

Weakness: CWE-89 · 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

References

ExploitDB-50207 exploit
Official Product Homepage product
Zero Science Lab Disclosure (ZSL-2021-5662) third-party-advisory
Zero Science GitHub Repository product
VulnCheck Advisory: COMMAX Smart Home IoT Control System SQL Injection Authentication Bypass third-party-advisory