CVE-2026-67193

Summary

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 Software

Weaknesses

• CWE-203: Observable Discrepancy

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://www.xlightftpd.com/whatsnew.htm
• https://www.vulncheck.com/advisories/xlight-ftp-server-information-disclosure-via-user-command

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