SEH Overwrite Vulnerability in Xlight FTP Server by Xlight
CVE-2019-25681

8.6HIGH

Key Information:

Vendor

Xlightftpd

Status
Xlight
Vendor
CVE Published:
5 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25681?

Xlight FTP Server version 3.9.1 is susceptible to an SEH overwrite vulnerability that can be exploited by local attackers. By crafting a malicious buffer string, attackers can overwrite SEH pointers, which may lead to application crashes and the possibility of executing arbitrary code. This vulnerability arises from insufficient validation of inputs in the program's execution field during the virtual server configuration, allowing exploitation through buffer overflow techniques.

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Affected Version(s)

Xlight 3.9.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25681 - Proof of Concept

References

https://www.exploit-db.com/exploits/46458
exploit
https://www.xlightftpd.com/index.htm
product
https://www.xlightftpd.com/download/xlight.zip
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Logan Whitmire
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