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CVE-2021-26379

31
FAUCET Score

CVE-2021-26379 is a critical vulnerability affecting AMD products, stemming from insufficient input validation in the System Management Unit (SMU). This flaw allows an unauthenticated attacker to remotely corrupt SMRAM, potentially leading to a complete loss of integrity and privilege escalation. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness and potential future interest.

Impacted Technologies

VendorProductVersion(s)CPE
< milanpi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:epyc_7373x_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 31st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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-3001
Vendor Advisory