CVE-2026-67193

Medium

Description

Xlight FTP Server before 3.9.5 contains an information disclosure vulnerability that allows unauthenticated attackers to obtain the server's current GetTickCount() value by sending a USER command with a username ending in the :adm suffix. Attackers can trigger the admin protocol path within the standard FTP listener pre-authentication to leak timing information from the FTP 331 response without requiring a separate port or configuration change.

SeverityMedium

CVSS5.3

Exploit probability—

ProductXlight FTP Server

PublishedJul 29, 2026

First seenJul 29, 2026

Weakness typeCWE-203CWE-203

How to fix

Update

Xlight Xlight FTP Server3.9.5 or later

Vendor advisories

xlightftpd.com/whatsnew.htm

Affected products

Product	Affected versions	Fixed in
Xlight Xlight FTP Server	v < 3.9.5	3.9.5

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