CVE-2021-20487 describes a critical vulnerability in the IBM Power9 Self Boot Engine (SBE) that allows a privileged user to inject malicious code and compromise the integrity of the host firmware, bypassing signature verification. With a CVSS score of 9.1 (Critical), this network-exploitable flaw grants high confidentiality, integrity, and availability impacts. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= fw930.00, < fw930.30CPE matchmatch criteria | cpe:2.3:o:ibm:power9_system_firmware:*:*:*:*:*:*:*:* | ||
>= fw940.00, < fw940.20CPE matchmatch criteria | cpe:2.3:o:ibm:power9_system_firmware:*:*:*:*:*:*:*:* | ||
< fw950.00CPE matchmatch criteria | cpe:2.3:o:ibm:power9_system_firmware:*:*:*:*:*:*:*:* | ||
< op940.20CPE matchmatch criteria | cpe:2.3:o:ibm:scale-out_lc_system_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.7 Bluesky, 0.4 Mastodon, and 1.7 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.