Netis DL4322D RTK 2.1.1 FTP Service DoS

Advisories

severity: high
date: November 14, 2025
Affecting: DL4322D firmware versions <= RTK 2.1.1
An affected version range remains undefined
This product appears to no longer be supported
CVE: CVE-2018-25125
CWE: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVSS: 8.7
CVSS V4 Vector: 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
References: ExploitDB-45424
Archived Netis DL4322D Product Site
Netis Product Site
Credit: Cakes
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.