CVE-2021-47707
CRITICALDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v4 Vector
Exploitability
Impact
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploit Intelligence
Low risk: more likely to be exploited than 30% of all known CVEs.
References
Related Vulnerabilities
Other CWE-1392 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-12856 | High | 7.2 | 84% | - | - |
| CVE-2026-26341 | Critical | 9.8 | 2.7% | - | - |
| CVE-2026-58453 | Critical | 9.8 | 1.9% | - | - |
| CVE-2024-4007 | High | 8.8 | 1.5% | - | Fix |
| CVE-2025-5124 | High | 8.1 | 1.0% | - | - |
| CVE-2025-1160 | High | 7.3 | 0.9% | - | - |
Common questions
How do I fix CVE-2021-47707?
No published fix for CVE-2021-47707 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2021-47707 being actively exploited?
Not that we know of. CVE-2021-47707 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.37% is the estimated probability that it will be exploited in the next 30 days. That is higher than 30% of all scored CVEs.
How severe is CVE-2021-47707?
CVE-2021-47707 has a CVSS v4 base score of 9.3, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.