CVE-2026-16661

HighCVSS 8.2/10Last modified Aug 25, 2026

Description

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.

Metrics

CVSS 3.1 8.2/10CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-190

Affected software

Vendor	Product	Versions
IBM	PowerVM Hypervisor	FW1120.00; >= FW1110.00, <= FW1110.30; >= FW1060.00, <= FW1060.80; >= FW950.00, <= FW950.H2

References

https://www.ibm.com/support/pages/node/7283237Vendor Advisory

Timeline

Published: Aug 19, 2026
Last modified: Aug 25, 2026
NVD status: Analyzed

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