SEH Overwrite Buffer Overflow in Xlight FTP Server

Publication date: 2026-04-05

Last updated on: 2026-04-09

Assigner: VulnCheck

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.

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Meta Information

Published

2026-04-05

Last Modified

2026-04-09

Generated

2026-07-06

AI Q&A

2026-04-06

EPSS Evaluated

2026-07-05

NVD

CVE-2019-25681

Affected Vendors & Products

Vendor	Product	Version / Range
xlightftpd	xlight_ftp_server	3.9.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

CVE-2019-25681 is a vulnerability in Xlight FTP Server version 3.9.1 involving a structured exception handler (SEH) overwrite. Local attackers can exploit this by supplying a specially crafted buffer string that causes a buffer overflow. This overflow corrupts the SEH chain by injecting a 428-byte payload through the program execution field in the virtual server configuration, potentially allowing the attacker to execute arbitrary code.

Impact Analysis

This vulnerability can allow local attackers to crash the Xlight FTP Server application and potentially execute arbitrary code with the privileges of the application. This can lead to unauthorized control over the affected system, data compromise, or disruption of service.

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