CVE-2021-47709

HIGH

COMMAX Smart Home System - DoS

Title source: llm

Description

COMMAX Smart Home System allows an unauthenticated attacker to change configuration and cause denial-of-service through the setconf endpoint. Attackers can trigger a denial-of-service scenario by sending a malformed request to the setconf endpoint.

Exploits (1)

exploitdb WORKING POC

by LiquidWorm · textwebappshardware

https://www.exploit-db.com/exploits/50209

View Code ZIP pw:eip

References (4)

[Exploit, Third Party Advisory] https://www.exploit-db.com/exploits/50209

[Various Sources] https://www.commax.com

[Third Party Advisory] https://www.vulncheck.com/advisories/commax-smart-home-ruvie-cctv-bridge-dvr-service-config-write-dos

[Third Party Advisory] https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5666.php

Scores

CVSS v4 8.7

EPSS 0.0012

EPSS Percentile 30.5%

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-306

Status published

Products (1)

COMMAX Co., Ltd./Smart Home Ruvie CCTV Bridge DVR Service

Published Dec 09, 2025

Tracked Since Feb 18, 2026