CVE-2021-47816
Thecus N4800Eco Nas Server Control Panel - Command Injection
CVSS v3
8.8
HIGH
EPSS Score
1.8 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
poc
SSVC status
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.
Technical details
- Published
- 2026-01-16
- Last Modified
- 2026-04-14
Frequently asked questions
What is CVE-2021-47816?
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.
Is CVE-2021-47816 actively exploited?
A proof-of-concept exploit exists for CVE-2021-47816, but active exploitation has not been confirmed at this time.
What is the CVSS score for CVE-2021-47816?
CVE-2021-47816 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-47816 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 500 free checks/month · Free API key
Other 2021 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).