CVE-2021-47707

CRITICAL

COMMAX CVD-Axx DVR 5.1.4 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47707. PoCs published by LiquidWorm.

AI-analyzed exploit summary This exploit demonstrates the use of weak default credentials (passkey=1234) to bypass authentication and disclose RTSP stream access on COMMAX CVD-Axx DVR devices. It includes cURL commands to authenticate and access sensitive endpoints.

Description

COMMAX CVD-Axx DVR 5.1.4 contains weak default administrative credentials that allow remote password attacks and disclose RTSP stream. Attackers can exploit this by sending a POST request with the 'passkey' parameter set to '1234', allowing them to access the web control panel.

Exploits (1)

exploitdb WORKING POC
by LiquidWorm · textwebappshardware
https://www.exploit-db.com/exploits/50210

This exploit demonstrates the use of weak default credentials (passkey=1234) to bypass authentication and disclose RTSP stream access on COMMAX CVD-Axx DVR devices. It includes cURL commands to authenticate and access sensitive endpoints.

Classification
Working Poc 100%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: COMMAX CVD-Axx DVR (versions 4.4.1, 5.1.2, 5.1.4)
No auth needed
Prerequisites: Network access to the target device · Default credentials not changed
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/50210
Various Sources product
https://www.commax.com
Third Party Advisory third-party-advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5667.php

Scores

CVSS v4 9.3
EPSS 0.0034
EPSS Percentile 25.5%
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

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1392
Status published
Products (1)
COMMAX Co., Ltd./COMMAX CVD-Axx DVR CVD-AH04 DVR 4.4.1
Published Dec 09, 2025
Tracked Since Feb 18, 2026