CVE-2023-53886 Xlight FTP Server 3.9.3.6 Stack Buffer Overflow Vulnerability via Execute Program
Attackers can cause a denial of service in Xlight FTP Server by triggering a stack buffer overflow in the Execute Program configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-53886?
CVE-2023-53886 is a medium-severity memory corruption vulnerability in Xlightftpd Xlight FTP Server, published on 15 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Xlight FTP Server 3.9.3.6 contains a stack buffer overflow vulnerability in the 'Execute Program' configuration that allows attackers to crash the application. Attackers can trigger the vulnerability by inserting 294 characters into the program execution configuration, causing a denial of service condition.
Which versions are affected by CVE-2023-53886?
It affects 1 product.
Products include Xlightftpd Xlight Ftp Server.
How do I fix CVE-2023-53886?
No fix has been published for CVE-2023-53886 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-2023-53886 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53886 exists.
Other vulnerabilities in Xlightftpd Xlight FTP Server
Sources
Also known as GHSA-hxpr-5v98-mw59.