CVE-2026-17100: CWE-787 Out-of-bounds Write in IBM Power Systems Firmware
CVE-2026-17100 is a high-severity out-of-bounds write vulnerability in IBM Power Systems Firmware affecting multiple firmware versions. It allows an attacker with authenticated service-level access to the BMC/FSP service processor mailbox interface to execute arbitrary code in the host firmware runtime. This leads to full control over the managed system, impacting confidentiality, integrity, and availability.
AI Analysis
Technical Summary
The vulnerability exists in the service processor mailbox interface of IBM Power Systems 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. An attacker with authenticated service-level access to the Baseboard Management Controller (BMC) or Flexible Service Processor (FSP) can exploit an out-of-bounds write (CWE-787) to execute arbitrary code within the host firmware runtime environment. This grants the attacker full control over the managed system, resulting in a critical compromise of confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows arbitrary code execution in the host firmware runtime, giving the attacker full control over the managed system. This compromises confidentiality, integrity, and availability of the system managed by the affected firmware versions.
Mitigation Recommendations
No patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated service-level access to the BMC/FSP to trusted personnel only.
CVE-2026-17100: CWE-787 Out-of-bounds Write in IBM Power Systems Firmware
Description
CVE-2026-17100 is a high-severity out-of-bounds write vulnerability in IBM Power Systems Firmware affecting multiple firmware versions. It allows an attacker with authenticated service-level access to the BMC/FSP service processor mailbox interface to execute arbitrary code in 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
IBM
Power Systems Firmware
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the service processor mailbox interface of IBM Power Systems 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. An attacker with authenticated service-level access to the Baseboard Management Controller (BMC) or Flexible Service Processor (FSP) can exploit an out-of-bounds write (CWE-787) to execute arbitrary code within the host firmware runtime environment. This grants the attacker full control over the managed system, resulting in a critical compromise of confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows arbitrary code execution in the host firmware runtime, giving the attacker full control over the managed system. This compromises confidentiality, integrity, and availability of the system managed by the affected firmware versions.
Mitigation Recommendations
No patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated service-level access to the BMC/FSP to trusted personnel only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T15:10:38.607Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a85fb7bacd9273b497a320d
Added to database: 08/19/2026, 18:52:43 UTC
Last enriched: 09/11/2026, 07:02:27 UTC
Last updated: 10/02/2026, 14:46:05 UTC
Views: 53
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