CVE-2026-16707
Authenticated FSP access can corrupt Hostboot and hijack IBM PowerVM hypervisor.
Is CVE-2026-16707 being exploited?
Not confirmed. CVE-2026-16707 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 0.13% probability of exploitation in the next 30 days.
How severe is CVE-2026-16707?
CVE-2026-16707 is rated High with a CVSS score of 8.2. 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-2026-16707?
Yes. A fix has been recorded for CVE-2026-16707. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16707 affect?
CVE-2026-16707 affects IBM PowerVM Hypervisor, IBM Flexible Service Processor (FSP), Hostboot firmware, FSP firmware: FW1120.00, FW1110.00-FW1110.30, FW1060.00-FW1060.80, FW950.00-FW950.H2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16707?
Restrict/segment FSP access, revoke unneeded credentials, apply vendor firmware updates when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated service-level FSP user can read/modify Hostboot memory, compromise boot firmware and hijack hypervisor for code exec, data theft, persistence, or DoS.
Immediate action required
- affectedFW1120.00
- affected>= FW1110.00 and <= FW1110.30
- affected>= FW1060.00 and <= FW1060.80
- affected>= FW950.00 and <= FW950.H2
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.