CVE-2021-46794

HIGHNVD 7.57.5—

7.5

Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum calculation triggering a data abort, resulting in a potential denial of service.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 67.9%
KEV: Not listed

Published

May 9, 2023

Last Modified

January 28, 2025

References (2)

psirt@amdhttps://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-125Out-of-bounds Read

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-07 15:23 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-46794?

CVE-2021-46794 is a high vulnerability published on May 9, 2023. Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum calculation triggering a data abort, resulting in a potential denial of service.

When was CVE-2021-46794 disclosed?

CVE-2021-46794 was first published in the National Vulnerability Database on May 9, 2023, with the most recent update on January 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-46794 actively exploited?

CVE-2021-46794 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 67.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-46794?

CVE-2021-46794 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-46794?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-46794, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-46794

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-46794?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)