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CVE-2021-26388

19
FAUCET Score

CVE-2021-26388 is a medium-severity vulnerability affecting AMD products, stemming from improper validation of the BIOS directory. This flaw allows for out-of-bounds memory reads, potentially leading to a denial of service (DoS) by exposing sensitive memory contents. With a CVSS score of 5.5, it requires local access and low privileges, but does not impact confidentiality or integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< romepi-sp3_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*
< romepi-sp3_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7302p_firmware:*:*:*:*:*:*:*:*
< romepi-sp3_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7402p_firmware:*:*:*:*:*:*:*:*
< romepi-sp3_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7502p_firmware:*:*:*:*:*:*:*:*
< romepi-sp3_1.0.0.dCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7702p_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
11.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 53rd percentile among its peer group of 15,938 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

amd.com / en/corporate/product-security/bulletin/amd-sb-1027
Vendor Advisory
amd.com / en/corporate/product-security/bulletin/amd-sb-1028
Vendor Advisory