CVE-2026-67193: Xlight FTP Server

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Xlight Xlight FTP Server: before 3.9.5 (fixed in 3.9.5)

Published 2026-07-29. Last modified 2026-07-30.