CVE-2018-25125 Netis DL4322D RTK 2.1.1 FTP Service DoS
An authenticated remote attacker can crash the Netis DL4322D router by sending a long argument to the FTP service, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-25125?
CVE-2018-25125 is a high-severity memory corruption vulnerability in Netis Systems Co., Ltd. DL4322D, published on 14 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2018-25125?
How do I fix CVE-2018-25125?
No fix has been published for CVE-2018-25125 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-25125 being exploited?
There is no known exploitation of CVE-2018-25125 in the wild and no public exploit code.
Sources
Also known as GHSA-3fh5-63gr-xqxc.