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

8.7HIGH

Key Information:

Vendor

Netis Systems Co., Ltd.

Status
Dl4322d
Vendor
CVE Published:
14 November 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25125?

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.

Affected Version(s)

DL4322D 0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-25125 - Proof of Concept

References

https://www.exploit-db.com/exploits/45424
exploit
https://web.archive.org/web/20180731191918/http://www.net...
product
https://www.netis-systems.com/
product

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Cakes
JSON
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CVE-2018-25125 : Buffer Overflow Vulnerability in Netis ADSL Router DL4322D FTP Service