CVE-2021-47709

HIGH

COMMAX Smart Home Ruvie CCTV Bridge DVR Service - Unauthenticated Denial of Service via setconf Endpoint

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47709. PoCs published by LiquidWorm.

AI-analyzed exploit summary This exploit demonstrates an unauthenticated configuration write vulnerability in COMMAX Smart Home Ruvie CCTV Bridge DVR Service, allowing an attacker to modify DVR settings and trigger a denial-of-service (DoS) via a crafted POST request to the /goform/setconf endpoint.

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

This exploit demonstrates an unauthenticated configuration write vulnerability in COMMAX Smart Home Ruvie CCTV Bridge DVR Service, allowing an attacker to modify DVR settings and trigger a denial-of-service (DoS) via a crafted POST request to the /goform/setconf endpoint.

Classification
Working Poc 95%
Attack Type
Dos | Config Manipulation
Complexity
Trivial
Reliability
Reliable
Target: COMMAX Smart Home Ruvie CCTV Bridge DVR Service (version n/a)
No auth needed
Prerequisites: Network access to the target device · Target device running the vulnerable service on port 8086
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/50209
Various Sources product
https://www.commax.com
Third Party Advisory third-party-advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5666.php

Scores

CVSS v4 8.7
EPSS 0.0032
EPSS Percentile 23.8%
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