Vulnerability · Published Dec 9, 2025 · Assigned by VulnCheck
CVE-2021-47707COMMAX CVD-Axx DVR Weak Default Credentials Stream Disclosure
Critical 9.3
In plain English
A critical-severity security flaw in COMMAX CVD-Axx DVR from COMMAX Co., Ltd.. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)0.4%top 69.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| COMMAX Co., Ltd. | COMMAX CVD-Axx DVR | CVD-AH04 DVR 4.4.1 |
Weakness: CWE-1392 · Vector: 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
References
- ExploitDB-50210 exploit
- Official Product Homepage product
- Zero Science Lab Disclosure (ZSL-2021-5667) third-party-advisory
- VulnCheck Advisory: COMMAX CVD-Axx DVR Weak Default Credentials Stream Disclosure third-party-advisory