CVE-2026-17100: CWE-787 Out-of-bounds Write in IBM Power Systems Firmware
IBM Power Firmware versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1, and OP940.00 through OP940.81 contain a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the BMC/FSP can exploit this out-of-bounds write flaw to execute arbitrary code within the host firmware runtime. This leads to full control over the managed system, impacting confidentiality, integrity, and availability.
AI Analysis
Technical Summary
CVE-2026-17100 is an out-of-bounds write vulnerability (CWE-787) in IBM Power Firmware affecting multiple firmware versions across FW1120, FW1110, FW1060, FW950, and OP940 series. The flaw exists in the service processor mailbox interface and requires the attacker to have authenticated service-level access to the Baseboard Management Controller (BMC) or Flexible Service Processor (FSP). Successful exploitation allows arbitrary code execution in the host firmware runtime environment, granting full control over the managed system. This results in a complete compromise of confidentiality, integrity, and availability of the affected system.
Potential Impact
An attacker with authenticated service-level access to the BMC/FSP can execute arbitrary code in the host firmware runtime, leading to full system compromise. This affects confidentiality, integrity, and availability of the managed system, potentially allowing unauthorized data access, system manipulation, or denial of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time.
CVE-2026-17100: CWE-787 Out-of-bounds Write in IBM Power Systems Firmware
Description
IBM Power Firmware versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1, and OP940.00 through OP940.81 contain a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the BMC/FSP can exploit this out-of-bounds write flaw to execute arbitrary code within the host firmware runtime. This leads to full control over the managed system, impacting confidentiality, integrity, and availability.
CVSS v3.1
Score 8.2high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-17100 is an out-of-bounds write vulnerability (CWE-787) in IBM Power Firmware affecting multiple firmware versions across FW1120, FW1110, FW1060, FW950, and OP940 series. The flaw exists in the service processor mailbox interface and requires the attacker to have authenticated service-level access to the Baseboard Management Controller (BMC) or Flexible Service Processor (FSP). Successful exploitation allows arbitrary code execution in the host firmware runtime environment, granting full control over the managed system. This results in a complete compromise of confidentiality, integrity, and availability of the affected system.
Potential Impact
An attacker with authenticated service-level access to the BMC/FSP can execute arbitrary code in the host firmware runtime, leading to full system compromise. This affects confidentiality, integrity, and availability of the managed system, potentially allowing unauthorized data access, system manipulation, or denial of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T15:10:38.607Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a85fb7bacd9273b497a320d
Added to database: 08/19/2026, 18:52:43 UTC
Last enriched: 08/19/2026, 19:07:47 UTC
Last updated: 08/19/2026, 19:32:10 UTC
Views: 2
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