EUVD-2026-62629
GHSA-w82q-x75m-xp3p
Severity by source
AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Service-level BMC authentication required (PR:H), local management interface (AV:L), scope changes to host firmware runtime (S:C), full triad impact post-exploitation.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM Power Firmware 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 - OP940.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the BMC/FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system.
AnalysisAI
Arbitrary code execution in IBM Power Firmware across multiple firmware branches (FW1120.00, FW1110.x, FW1060.x, FW950.x, OP940.x) stems from a CWE-787 out-of-bounds write in the service processor mailbox interface. An authenticated attacker with service-level access to the BMC/FSP can exploit this buffer overflow to cross the trust boundary from the management processor into the host firmware runtime, gaining full control over the managed Power system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires authenticated service-level access to the IBM BMC/FSP (Flexible Service Processor) - the CVSS vector AV:L/PR:H confirms this is a local or adjacent-network interface requiring high-privilege credentials. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.2 score with S:C accurately reflects the severity of crossing from the BMC management layer into the host firmware runtime - a trust boundary violation with maximum C/I/A impact on the managed system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch available per IBM advisory at https://www.ibm.com/support/pages/node/7283236. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all IBM Power systems currently running affected firmware versions and document which administrators have service processor access to each system. …
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External POC / Exploit Code
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