CVE-2024-21947
Estado: AplazadaAlta (7.5)—
Improper input validation in the system management mode (SMM) could allow a privileged attacker to overwrite arbitrary memory potentially resulting in arbitrary code execution at the SMM level.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.14%
- Percentil entre todas las CVEs puntuadas: 3
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation90 % - Impacto principal
T1059Command and Scripting Interpreterexecution85 % - Impacto secundario
T1542.001System Firmwarestealth · persistence80 %
AV:L + PR:H indica escalada local con privilegios altos. SMM es firmware/hipervisor; sobrescritura de memoria arbitra + code execution = ejecución de comandos a nivel sistema (T1059) y potencial persistencia en firmware (T1542.001).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
CWE
- CWE-1220
Referencias
JSON original (NVD)
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"role": "CISA Coordinator",
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"version": "2.0.3",
"timestamp": "2025-09-09T03:55:22.910224Z"
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"published": "2025-09-06T18:15:39.063",
"references": [
{
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html",
"source": "psirt@amd.com"
},
{
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html",
"source": "psirt@amd.com"
}
],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@amd.com",
"description": [
{
"lang": "en",
"value": "CWE-1220"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Improper input validation in the system management mode (SMM) could allow a privileged attacker to overwrite arbitrary memory potentially resulting in arbitrary code execution at the SMM level."
}
],
"lastModified": "2026-06-17T07:10:26.607",
"sourceIdentifier": "psirt@amd.com"
}