Auth bypass in a widely deployed HPE network controller allows full host compromise, risking enterprise network availability and integrity.
CVE-2026-19766
Auth bypass in HPE Fabric Composer enables unauthenticated privileged RCE.
Is CVE-2026-19766 being exploited?
Not confirmed. CVE-2026-19766 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-19766?
CVE-2026-19766 is rated Critical with a CVSS score of 9.6. 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-2026-19766?
Yes. A fix has been recorded for CVE-2026-19766. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-19766 affect?
CVE-2026-19766 affects HPE Networking Fabric Composer (AFC) underlying OS. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-19766?
Apply HPE security update immediately; isolate AFC hosts and restrict adjacent network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated adjacent attacker can execute arbitrary code as a privileged user, fully compromising the AFC host and control plane.
Immediate action required
- affected>= 7.0.0 and <= 7.3.3
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.