CVE-2026-16707

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 send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results 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-125

Affected software

VendorProductVersions
IBMPowerVM HypervisorFW1120.00; >= FW1110.00, <= FW1110.30; >= FW1060.00, <= FW1060.80; >= FW950.00, <= FW950.H2

References

Timeline

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

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CVE-2026-16707: High severity, CVSS 8.2 | Vulnix