CVE-2018-25125

Netis DL4322D RTK 2.1.1 FTP Service DoS

State: Published
Severity: 8.7 High
Published: Nov 14, 2025
Updated: Apr 7, 2026
Reserved: Oct 29, 2025

Description

Netis ADSL Router DL4322D firmware RTK 2.1.1 contains a buffer overflow vulnerability in the embedded FTP service that allows an authenticated remote user to trigger a denial of service. After logging in to the FTP service, sending an FTP command such as ABOR with an excessively long argument causes the service, and in practice the router, to crash or become unresponsive, resulting in a loss of availability for the device and connected users.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
DL4322DNetis Systems Co., Ltd.	RTK 2.1.1 and earlierAffected

References

https://www.exploit-db.com/exploits/45424exploit
https://web.archive.org/web/20180731191918/http://www.netis-systems.com/Home/detail/id/74.htmlproduct
https://www.netis-systems.com/product
https://www.vulncheck.com/advisories/netis-dl4322d-ftp-service-dosthird-party-advisory

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