What is CVE-2021-47816?

CVE-2021-47816 is a high-severity vulnerability in Thecus N4800eco Nas Server Control Panel, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-01-16.

How severe is CVE-2021-47816?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Thecus N4800eco Nas Server Control Panel

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…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.016 (73.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Thecus N4800eco Nas Server Control Panel — versions N4800Eco

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47816?: CVE-2021-47816 is a high-severity vulnerability in Thecus N4800eco Nas Server Control Panel, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-01-16.
How severe is CVE-2021-47816?: High severity. CVSS v3 base score is 8.8 out of 10.