CVE-2021-47707

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.36% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 30.4% of scored records. A rank, not a probability.

NVD base score

9.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS 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/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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-12-09 20:39Z10 MO AGO

Last updated

2026-04-07 14:05Z6 MO AGO

Reserved

2025-12-05

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS 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

Weaknesses

• CWE-1392Use of Default CredentialsBase

Data version

5.2

Document digest

453360929c16880b8a16704b5d4df8dc1e00103b72cbfa3b2908705e8ddd3845

• www.exploit-db.comExploitDB-50210https://www.exploit-db.com/exploits/50210exploit
• www.commax.comOfficial Product Homepagehttps://www.commax.comproduct
• www.zeroscience.mkZero Science Lab Disclosure (ZSL-2021-5667)https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5667.phpthird-party-advisory
• www.vulncheck.comVulnCheck Advisory: COMMAX CVD-Axx DVR Weak Default Credentials Stream Disclosurehttps://www.vulncheck.com/advisories/commax-cvd-axx-dvr-weak-default-credentials-stream-disclosurethird-party-advisory