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CVE-2021-46794

23
FAUCET Score

CVE-2021-46794 describes an out-of-bounds read vulnerability in the AMD Secure Processor (ASP) due to insufficient bounds checking during System Management Interface (SMI) mailbox checksum calculations. This flaw, affecting AMD products, can lead to a data abort and a potential denial of service. With a CVSS score of 7.5 (HIGH), it can be exploited remotely with low attack complexity, requiring no user interaction or privileges. Currently, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
cezannepi-fp6_1.0.0.6CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_5300g_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cezannepi-fp6_1.0.0.6CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_5300ge_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cezannepi-fp6_1.0.0.6CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_5500_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cezannepi-fp6_1.0.0.6CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_5600_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cezannepi-fp6_1.0.0.6CPE matchmatch criteria
cpe:2.3:o:amd:ryzen_5600g_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.62%
Probability of exploitation in next 30 days
EPSS Percentile
45.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 23rd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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-4001
Vendor Advisory