Xlight FTP Server 3.9.3.6 Stack Buffer Overflow Vulnerability via Execute Program

Advisories

severity: medium
date: December 15, 2025
Affecting: Xlight FTP Server 3.9.3.6
CVE: CVE-2023-53886
CWE: CWE-121 Stack-based Buffer Overflow
CVSS: 5.7
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References: ExploitDB-51665
XLight FTP Server
Credit: Yehia Elghaly
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.