CVE-2021-26388

MEDIUMNVD 5.55.5—

5.5

Improper validation of the BIOS directory may allow for searches to read beyond the directory table copy in RAM, exposing out of bounds memory contents, resulting in a potential denial of service.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 12.3%
KEV: Not listed

Published

May 11, 2022

Last Modified

November 21, 2024

References (4)

psirt@amdhttps://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
psirt@amdhttps://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× 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.

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Frequently asked(5)

What is CVE-2021-26388?

CVE-2021-26388 is a medium vulnerability published on May 11, 2022. Improper validation of the BIOS directory may allow for searches to read beyond the directory table copy in RAM, exposing out of bounds memory contents, resulting in a potential denial of service.

When was CVE-2021-26388 disclosed?

CVE-2021-26388 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-2021-26388 actively exploited?

CVE-2021-26388 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-26388?

CVE-2021-26388 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-26388?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-26388, 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-2021-26388

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-26388?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)