What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-09 · updated 2026-06-17
• Weakness: CWE-1392

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.

Affected products

• COMMAX Co., Ltd. COMMAX CVD-Axx DVR: CVD-AH04 DVR 4.4.1

References

• https://www.commax.com
• https://www.exploit-db.com/exploits/50210
• https://www.vulncheck.com/advisories/commax-cvd-axx-dvr-weak-default-credentials-stream-disclosure
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5667.php

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