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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.

PUBLISHED Reserved 2026-01-14 | Published 2026-01-16 | Updated 2026-01-16 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

N4800Eco
affected

Credits

Metin Yunus Kandemir finder

References

www.exploit-db.com/exploits/49926 (ExploitDB-49926) exploit

www.thecus.com/ (Thecus Official Vendor Homepage) product

www.thecus.com/product.php?PROD_ID=83 (Thecus N4800Eco Product Page) product

docs.unsafe-inline.com/...ver-control-panel-comand-injection (Researcher Blog) technical-description exploit

www.vulncheck.com/...-server-control-panel-command-injection (VulnCheck Advisory: Thecus N4800Eco Nas Server Control Panel - Command Injection) third-party-advisory

cve.org (CVE-2021-47816)

nvd.nist.gov (CVE-2021-47816)

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