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CVE-2022-23821

24
FAUCET Score

CVE-2022-23821 describes an improper access control vulnerability in System Management Mode (SMM) affecting AMD products. This critical vulnerability, rated 9.8 CVSS, allows an unauthenticated attacker to write to SPI ROM over the network with low complexity, potentially leading to arbitrary code execution and full compromise of confidentiality, integrity, and availability. Despite its high severity, there is currently no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
comboam4_pi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_9_3900_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
comboam4_v2_pi_1.2.0.8CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_9_3900_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
comboam4_pi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_9_3900x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
comboam4_v2_pi_1.2.0.8CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_9_3900x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
comboam4_pi_1.0.0.9CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_9_3900xt_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*

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
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 44th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

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-4002
Third Party Advisory
amd.com / en/corporate/product-security/bulletin/AMD-SB-5001