IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is affected by a vulnerability in partition firmware during network boot. An unauthenticated attacker on the same network as a partition undergoing network boot can send a malformed packet, allowing arbitrary code to be executed in the partition firmware and compromising everything subsequently loaded by that partition. Other partitions and the managed system are not affected. Only partitions actively performing a network boot are affected, resulting in a confidentiality, integrity, and availability impact.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Ibm
  • Power Systems Firmware
  • Powervm Hypervisor

No data.

No data.

References
Link Providers
https://www.ibm.com/support/pages/node/7283232 cve-icon cve-icon
History

Thu, 20 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 19 Aug 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Ibm powervm Hypervisor
Vendors & Products Ibm powervm Hypervisor

Wed, 19 Aug 2026 20:00:00 +0000

Type Values Removed Values Added
Description IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is affected by a vulnerability in partition firmware during network boot. An unauthenticated attacker on the same network as a partition undergoing network boot can send a malformed packet, allowing arbitrary code to be executed in the partition firmware and compromising everything subsequently loaded by that partition. Other partitions and the managed system are not affected. Only partitions actively performing a network boot are affected, resulting in a confidentiality, integrity, and availability impact.
Title Power System Out-of-bounds Write
First Time appeared Ibm
Ibm power Systems Firmware
Weaknesses CWE-787
CPEs cpe:2.3:o:ibm:power_systems_firmware:fw1060.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1060.80:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1110.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1110.30:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw950.h2:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm power Systems Firmware
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published: 2026-08-19T19:41:43.179Z

Updated: 2026-08-20T15:57:05.839Z

Reserved: 2026-08-04T13:21:06.083Z

Link: CVE-2026-18821

cve-icon Vulnrichment

Updated: 2026-08-20T15:49:51.152Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-19T20:17:13.603

Modified: 2026-08-20T16:17:17.427

Link: CVE-2026-18821

cve-icon Redhat

No data.