CVE-2026-54609
Unauthenticated UDP RECONNECT_REQUEST amplification causes host DoS in QTI Neon 1.0.0
Is CVE-2026-54609 being exploited?
Not confirmed. CVE-2026-54609 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 0.26% probability of exploitation in the next 30 days.
How severe is CVE-2026-54609?
CVE-2026-54609 is rated High with a CVSS score of 8.6. 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-2026-54609?
Yes. A fix has been recorded for CVE-2026-54609. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54609 affect?
CVE-2026-54609 affects QTI Neon 1.0.0 relay, Applications using QTI Neon relay. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54609?
Restrict/validate RECONNECT_REQUESTs, rate-limit or block relay UDP ports; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated clients can amplify relay-to-host RECONNECT_REQUESTs to flood and deny service on relay hosts.
Immediate action required
- affected1.0.0
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.