CVE-2026-16661
High · 8.2CVSS
8.2
EPSS
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Published
Aug 19, 2026
CISA due date
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The record
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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