Vulnerability in Xlight FTP Server
CVE-2026-67193
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.
EPSS: 0.003 (20.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Xlight Ftp Server — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (third-party-advisory)
- Changelog (release-notes)
Frequently asked questions
- What is CVE-2026-67193?
- CVE-2026-67193 is a medium-severity vulnerability in Xlight FTP Server, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2026-07-29.
- How severe is CVE-2026-67193?
- Medium severity. CVSS v3 base score is 5.3 out of 10.