CVE-2019-25654 Core FTP/SFTP Server 1.2 Denial of Service via Buffer Overflow
Attackers can crash the Core FTP/SFTP Server by sending an excessively long string in the User domain field, 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-2019-25654?
CVE-2019-25654 is a high-severity memory corruption vulnerability in Coreftp Core FTP/SFTP Server, published on 30 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Core FTP/SFTP Server 1.2 contains a buffer overflow vulnerability that allows attackers to crash the service by supplying an excessively long string in the User domain field. Attackers can paste a malicious payload containing 7000 bytes of data into the domain configuration to trigger an application crash and deny service.
Weakness: CWE-787
Which versions are affected by CVE-2019-25654?
It affects 1 product.
Products include Coreftp Core Ftp.
How do I fix CVE-2019-25654?
No fix has been published for CVE-2019-25654 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-2019-25654 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25654 exists.
Other vulnerabilities in Coreftp Core FTP/SFTP Server
Sources
Also known as GHSA-rj7r-w646-cjw4.