CVE-2019-25681 Xlight FTP Server 3.9.1 SEH Overwrite Buffer Overflow
Local attackers can trigger a buffer overflow in Xlight FTP Server via crafted configuration input, potentially leading to code execution or application crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-25681?
CVE-2019-25681 is a high-severity memory corruption vulnerability in Xlightftpd Xlight, published on 5 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Xlight FTP Server 3.9.1 contains a structured exception handler (SEH) overwrite vulnerability that allows local attackers to crash the application and overwrite SEH pointers by supplying a crafted buffer string. Attackers can inject a 428-byte payload through the program execution field in virtual server configuration to trigger a buffer overflow that corrupts the SEH chain and enables potential code execution.
Weakness: CWE-787
Which versions are affected by CVE-2019-25681?
It affects 1 product.
Products include Xlightftpd Xlight Ftp Server.
How do I fix CVE-2019-25681?
No fix has been published for CVE-2019-25681 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-2019-25681 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25681 exists.
Other vulnerabilities in Xlightftpd Xlight
Sources
Also known as GHSA-x9m5-f2h9-hrgh.