How severe is CVE-2021-47707?

CVE-2021-47707 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2021-47707 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-47707?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2021-47707 have an EU (EUVD) identifier?

Yes. CVE-2021-47707 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34732.

When was CVE-2021-47707 published?

CVE-2021-47707 was published on 2025-12-09 and last updated on 2026-06-17.

CVE-2021-47707

CVE-2021-47707 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1392.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34732
Weakness: CWE-1392
Published: 2025-12-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-47707?: 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 severe is CVE-2021-47707?: CVE-2021-47707 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2021-47707 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-47707?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2021-47707 have an EU (EUVD) identifier?: Yes. CVE-2021-47707 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34732.
When was CVE-2021-47707 published?: CVE-2021-47707 was published on 2025-12-09 and last updated on 2026-06-17.

References

Other CWE-1392 vulnerabilities

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