CVE-2021-26347

MEDIUMNVD 4.74.7—

4.7

Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service.

CVSS v3: 4.7
EG Score: 4.7(medium)
EPSS: 15.3%
KEV: Not listed

Published

May 11, 2022

Last Modified

November 21, 2024

References (2)

psirt@amdhttps://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 22:24 UTCEG score recompute
2026-05-25 22:24 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-26347?

CVE-2021-26347 is a medium vulnerability published on May 11, 2022. Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service.

When was CVE-2021-26347 disclosed?

CVE-2021-26347 was first published in the National Vulnerability Database on May 11, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-26347 actively exploited?

CVE-2021-26347 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-26347?

CVE-2021-26347 has a CVSS v3 base score of 4.7 (NVD).

How do I remediate CVE-2021-26347?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-26347, 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-2021-26347

📅 Published

🔄 Last Modified

🔗 References (2)