{"id":"CVE-2021-26402","state":"PUBLISHED","title":"Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to ","description":"Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES regions which may lead to a potential loss of integrity and availability.\n\n","publishedAt":"2023-01-10T20:56:41.784Z","updatedAt":"2025-04-08T20:27:13.237Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","source":"CISA-ADP"},"assigner":"AMD","products":["AMD 2nd Gen EPYC","AMD 3rd Gen EPYC"],"affected":[{"vendor":"AMD","product":"2nd Gen EPYC","packageName":"AGESA","defaultStatus":"unaffected","versions":[{"version":"Various ","status":"affected"}],"platforms":["x86"]},{"vendor":"AMD","product":"3rd Gen EPYC","packageName":"AGESA","defaultStatus":"unaffected","versions":[{"version":"various ","status":"affected"}],"platforms":["x86"]}],"references":["https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T19:48:13.210Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/26xxx/CVE-2021-26402.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-26402","state":"PUBLISHED","datePublished":"2023-01-10T20:56:41.784Z","dateUpdated":"2025-04-08T20:27:13.237Z","assignerShortName":"AMD","assignerOrgId":"b58fc414-a1e4-4f92-9d70-1add41838648","dateReserved":"2021-01-29T21:24:26.169Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES regions which may lead to a potential loss of integrity and availability.\n\n"}],"affected":[{"vendor":"AMD","product":"2nd Gen EPYC","packageName":"AGESA","defaultStatus":"unaffected","versions":[{"version":"Various ","status":"affected"}],"platforms":["x86"]},{"vendor":"AMD","product":"3rd Gen EPYC","packageName":"AGESA","defaultStatus":"unaffected","versions":[{"version":"various ","status":"affected"}],"platforms":["x86"]}],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032","tags":["vendor-advisory"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"AMD","orgId":"b58fc414-a1e4-4f92-9d70-1add41838648","dateUpdated":"2023-01-11T07:01:59.843Z"},"datePublic":"2023-01-10T17:30:00.000Z","source":{"advisory":"AMD-SB-1032","discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032","tags":["vendor-advisory","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T20:26:25.169Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.1,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-08T20:26:11.401792Z","id":"CVE-2021-26402","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","type":"CWE","lang":"en","description":"CWE-787 Out-of-bounds Write"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-08T20:27:13.237Z"}}]}}}