---
cve: "CVE-2021-47707"
severity: "CRITICAL"
cvss: 9.3
epss: "0.4%"
vendor: "COMMAX Co., Ltd."
kev: false
exploited: false
published: "2025-12-09 21:15:49"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T15:16:28+02:00"
---

# CVE-2021-47707

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-04-07 14:05:35
- CNA-CVSS: **9.3** (`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`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-1392** — Use of Default Credentials
  The product uses default credentials (such as passwords or cryptographic keys) for potentially critical functionality.

## Referenzen

- <https://www.exploit-db.com/exploits/50210>
- <https://www.commax.com>
- <https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5667.php>
- <https://www.vulncheck.com/advisories/commax-cvd-axx-dvr-weak-default-credentials-stream-disclosure>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2021-47707/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_