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CVE-2021-47707— COMMAX CVD-Axx DVR Weak Default Credentials Stream Disclosure

Quick assessment

Affected
COMMAX Co., Ltd. COMMAX CVD-Axx DVR
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

COMMAX CVD-Axx DVR是韩国COMMAX公司的一系列数字视频录像机。 COMMAX CVD-Axx DVR 5.1.4版本存在安全漏洞，该漏洞源于默认凭据弱问题，可能导致远程密码攻击和RTSP流泄露。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.37% · P29
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I. Basic Information for CVE-2021-47707

Vulnerability Information
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Vulnerability Title
COMMAX CVD-Axx DVR Weak Default Credentials Stream Disclosure
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1392
Source: CVE Program / CVE List V5
Vulnerability Title
COMMAX CVD-Axx DVR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
COMMAX CVD-Axx DVR是韩国COMMAX公司的一系列数字视频录像机。 COMMAX CVD-Axx DVR 5.1.4版本存在安全漏洞，该漏洞源于默认凭据弱问题，可能导致远程密码攻击和RTSP流泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
COMMAX Co., Ltd. COMMAX CVD-Axx DVR CVD-AH04 DVR 4.4.1 -

II. Public POCs for CVE-2021-47707

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III. Intelligence Information for CVE-2021-47707

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Exploits & Public PoCs for CVE-2021-47707 (1)

Other References for CVE-2021-47707 (3)

Same Patch Batch · COMMAX Co., Ltd. · 2025-12-09 · 7 CVEs total

CVE-2021-47709 COMMAX Smart Home Ruvie CCTV Bridge DVR Service Config Write / DoS
CVE-2021-47708 COMMAX Smart Home IoT Control System SQL Injection Authentication Bypass
CVE-2021-47710 COMMAX Smart Home Ruvie CCTV Bridge DVR Service RTSP Credentials Disclosure
CVE-2021-47705 CNC_Ctrl DllUnregisterServer Access Violation
CVE-2021-47706 COMMAX Biometric Access Control System Authentication Bypass
CVE-2021-47719 CNC_Ctrl DllUnregisterServer f5501 Access Violation

IV. Related Vulnerabilities

Same vendor: COMMAX Co., Ltd.
Same weakness: CWE-1392

V. Comments for CVE-2021-47707

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