CVE-2026-67192
Pre-auth stack buffer overflow in Xlight FTP Server SSH GCM handling enabling RCE
Is CVE-2026-67192 being exploited?
Not confirmed. CVE-2026-67192 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.66% probability of exploitation in the next 30 days.
How severe is CVE-2026-67192?
CVE-2026-67192 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-67192?
Yes. A fix has been recorded for CVE-2026-67192. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-67192 affect?
CVE-2026-67192 affects Xlight FTP Server < 3.9.5. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-67192?
Upgrade to Xlight FTP Server 3.9.5+ or block/limit SSH access until patched
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote code execution via malformed SSH GCM packets that overwrite stack cookie and return address.
Immediate action required
- affected< 3.9.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.