CVE-2026-67193
Xlight FTP Server < 3.9.5 Information Disclosure via USER Command
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jul 29, 2026
- Updated
- Aug 14, 2026
- Reserved
- Jul 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-203 Observable Discrepancy
Affected Products
| Product | Versions |
|---|---|
Xlight FTP ServerXlight |
|
References
- Changelogrelease-notes
- https://www.vulncheck.com/advisories/xlight-ftp-server-information-disclosure-via-user-commandthird-party-advisory
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