Vulnerability · Published Dec 9, 2025 · Assigned by VulnCheck
CVE-2021-47709COMMAX Smart Home Ruvie CCTV Bridge DVR Service Config Write / DoS
High 8.7
In plain English
A high-severity missing authentication in Smart Home Ruvie CCTV Bridge DVR Service 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 29% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.4%top 71.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
COMMAX Smart Home System allows an unauthenticated attacker to change configuration and cause denial-of-service through the setconf endpoint. Attackers can trigger a denial-of-service scenario by sending a malformed request to the setconf endpoint.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| COMMAX Co., Ltd. | Smart Home Ruvie CCTV Bridge DVR Service | * |
Weakness: CWE-306 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- ExploitDB-50209 exploit
- Official Product Homepage product
- Zero Science Lab Disclosure (ZSL-2021-5666) third-party-advisory
- VulnCheck Advisory: COMMAX Smart Home Ruvie CCTV Bridge DVR Service Config Write / DoS third-party-advisory