CVE-2023-53886

Xlight FTP Server 3.9.3.6 Stack Buffer Overflow Vulnerability via Execute Program

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.

Affected

Xlightftpd · Xlight FTP Server

CVSS v4.0 VULNCHECK

5.1 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.43% chance of exploitation in the next 30 days, 35th percentile

Published

2025-12-15

Updated

2026-05-12

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/51665

Security advisories

• https://www.xlightftpd.com
• https://www.vulncheck.com/advisories/xlight-ftp-server-stack-buffer-overflow-vulnerabilit…

References

• CVE Record
• NVD entry