CVE-2026-16832

Analyzed Analyzed - Analysis Complete

IBM Power Systems Firmware Code Execution Vulnerability

Publication date: 2026-08-19

Last updated on: 2026-08-25

Assigner: IBM Corporation

Description

IBM Power Systems Firmware 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 FSP management network protocol. An attacker with authenticated HMC administrator access can execute arbitrary code on the service processor, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact.

CVSS Scores

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Meta Information

Published

2026-08-19

Last Modified

2026-08-25

Generated

2026-09-09

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-16832

EUVD

EUVD-2026-62690

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	power_system_e1080_(9080-hex)_firmware	From fw1060.00 (inc) to fw1060.81 (exc)
ibm	power_system_e1180_(9080-heu)_firmware	From fw1110.00 (inc) to fw1110.31 (exc)
ibm	power_system_e1180_(9080-heu)_firmware	fw1120.00
ibm	power_system_s922_(9009-22g)_firmware	From fw950.00 (inc) to fw950.h3 (exc)
ibm	power_system_h922_(9223-22s)_firmware	From fw950.00 (inc) to fw950.h3 (exc)
ibm	power_system_s914_(9009-41g)_firmware	From fw950.00 (inc) to fw950.h3 (exc)
ibm	power_system_s924_(9009-42g)_firmware	From fw950.00 (inc) to fw950.h3 (exc)
ibm	power_system_h924_(9223-42s)_firmware	From fw950.00 (inc) to fw950.h3 (exc)
ibm	power_system_e950_(9040-mr9)_firmware	From fw950.00 (inc) to fw950.h3 (exc)
ibm	power_system_e980_(9080-m9s)_firmware	From fw950.00 (inc) to fw950.h3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

CVE-2026-16832 is a stack-based buffer overflow vulnerability in IBM Power Systems Firmware affecting the FSP management network protocol. An attacker with authenticated HMC administrator access can exploit this flaw to execute arbitrary code on the service processor, gaining full control over the managed system.

Detection Guidance

Detection requires checking firmware versions against affected ranges. For Power11 systems, verify if FW1120.00 is installed. For Power10, check if FW1060.00-FW1060.80 is present. For Power9, confirm FW950.00-FW950.H2. Use HMC commands like 'lshmc -V' to list firmware versions. Inspect network traffic for unauthorized FSP management protocol interactions.

Impact Analysis

This vulnerability allows an attacker to execute arbitrary code on the service processor, resulting in full control over the managed system. This can lead to significant confidentiality, integrity, and availability impacts, including unauthorized access to sensitive data, system manipulation, and potential system downtime.

Compliance Impact

This vulnerability can severely impact compliance with GDPR and HIPAA by compromising data confidentiality and integrity. Unauthorized access to sensitive data could lead to violations of these regulations, resulting in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Update firmware to the latest versions: FW1120.01(1120_167) or newer for Power 11 systems, FW1060.81(1060_184) or newer for Power 10 systems, and FW950.H3(950_230) or newer for Power9 systems. Protect access to the FSP's network interface as a mitigation measure.

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