CVE-2021-47709 COMMAX Smart Home Ruvie CCTV Bridge DVR Service Config Write / DoS
Unauthenticated attackers can modify configuration and cause denial-of-service in COMMAX Smart Home Ruvie CCTV Bridge DVR Service via the setconf endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47709?
CVE-2021-47709 is a high-severity missing authorization vulnerability in COMMAX Co., Ltd. Smart Home Ruvie CCTV Bridge DVR Service, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-306
Which versions are affected by CVE-2021-47709?
How do I fix CVE-2021-47709?
No fix has been published for CVE-2021-47709 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-47709 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47709 exists.
Sources
Also known as GHSA-5gpj-jhmx-464r.