CVE-2026-16606
Unauthenticated pre-auth RCE in Fujitsu openFT on Linux and Oracle Solaris
Is CVE-2026-16606 being exploited?
Not confirmed. CVE-2026-16606 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 0.65% probability of exploitation in the next 30 days.
How severe is CVE-2026-16606?
CVE-2026-16606 is rated Critical with a CVSS score of 9.3. 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-2026-16606?
Yes. A fix has been recorded for CVE-2026-16606. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16606 affect?
CVE-2026-16606 affects Fujitsu Software openFT (GNU/Linux) < 12.1D00, Fujitsu Software openFT (Oracle Solaris) < 12.1D00. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16606?
Upgrade to openFT 12.1D00 or apply vendor patch; restrict access and monitor logs
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote code execution as the service user on affected Linux/Solaris systems, enabling full system compromise and lateral movement.
Immediate action required
- affected<= 12.1C96
- affected<= 12.1C95
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.