PT-2026-65838 · Xlight · Xlight Ftp Server

CVE-2026-67193 · Published 2026-07-29 · Updated 2026-07-29

Mitre

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

CVE-2026-67193

Affected Products

Xlight Ftp Server

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-67193 · Security Note
• https://vulncheck.com/advisories/xlight-ftp-server-information-disclosure-via-user-command · Note
• https://xlightftpd.com/whatsnew.htm · Note