Critical severity9.1NVD Advisory· Published May 26, 2021· Updated Jun 17, 2026

CVE-2021-20487

Description

IBM Power9 Self Boot Engine(SBE) could allow a privileged user to inject malicious code and compromise the integrity of the host firmware bypassing the host firmware signature verification process.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

IBM/Power9 System Firmware
cpe:2.3:o:ibm:power9_system_firmware:*:*:*:*:*:*:*:*
Range: >=fw930.00,<fw930.30
IBM/Scale Out Lc System Firmware
cpe:2.3:o:ibm:scale-out_lc_system_firmware:*:*:*:*:*:*:*:*
Range: <op940.20
IBM/Power9 Self Boot Enginellm-fuzzy
IBM/Power 7 Systems 740cpe-rescue
Range: FW930

Patches

Vulnerability mechanics

References

exchange.xforce.ibmcloud.com/vulnerabilities/197730nvdVDB EntryVendor Advisory
www.ibm.com/support/pages/node/6455911nvdVendor Advisory

News mentions

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