CVE-2021-47707 - CVE House
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Status published Critical CVE-2021-47707

COMMAX CVD-Axx DVR Weak Default Credentials Stream Disclosure

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • LiquidWorm as Gjoko Krstic of Zero Science Lab

References

More from COMMAX Co., Ltd.

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CVE-2021-47709
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CVE-2021-47708
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Critical 9.3

Affected Vendor

COMMAX Co., Ltd.

View all reports →

Affected Software

COMMAX CVD-Axx DVR
Vulnerable Versions:
CVD-AH04 DVR 4.4.1

Timeline

Official Publish: December 9th, 2025
Last Modified: April 7th, 2026
Added to House: July 21st, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-1392

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.