CVE-2021-47816 Thecus N4800Eco Nas Server Control Panel - Command Injection
Authenticated attackers can execute arbitrary system commands with administrative privileges via user management endpoints in Thecus NAS servers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47816?
CVE-2021-47816 is a medium-severity command injection vulnerability in Thecus N4800Eco Nas Server Control Panel, published on 16 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Thecus N4800Eco NAS Server Control Panel contains a command injection vulnerability that allows authenticated attackers to execute arbitrary system commands through user management endpoints. Attackers can inject commands via username and batch user creation parameters to execute shell commands with administrative privileges.
Weakness: CWE-78
Which versions are affected by CVE-2021-47816?
How do I fix CVE-2021-47816?
No fix has been published for CVE-2021-47816 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-47816 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47816 exists.
Sources
Also known as GHSA-6qxr-24qm-qr24.