{"cve":"CVE-2021-26387","nvd":{"published":"2024-08-13T17:15:17.563","modified":"2026-06-17T03:43:17.950","status":"Deferred","description":"Insufficient access controls in ASP kernel may allow a\nprivileged attacker with access to AMD signing keys and the BIOS menu or UEFI\nshell to map DRAM regions in protected areas, potentially leading to a loss of platform integrity.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L","score":3.9},"cwes":["CWE-863"],"references":["https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html","https://www.amd.com/en/resources/product-security/bulletin/amd-sb-5002.html"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:53:51.317825789+00:00"},"epss":{"cve":"CVE-2021-26387","score":0.00146,"percentile":0.03783,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}