CVE-2023-20577
Estado: Pendiente de análisisAlta (7.4)—
A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 4
- 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 escalation85 % - Impacto principal
T1059Command and Scripting Interpreterexecution80 %
Acceso local (AV:L) sin interacción, con CWE-121 (heap overflow) en SMM; requiere vulnerabilidad secundaria para escribir SPI flash, permitiendo ejecución arbitraria de código (impacto T1059).
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-121
Referencias
JSON original (NVD)
Mostrar
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"role": "CISA Coordinator",
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{
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"version": "2.0.3",
"timestamp": "2026-09-03T03:56:43.507455Z"
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"published": "2026-09-02T20:17:34.093",
"references": [
{
"url": "https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7009.html",
"source": "psirt@amd.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@amd.com",
"description": [
{
"lang": "en",
"value": "CWE-121"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution."
}
],
"lastModified": "2026-09-04T20:17:20.570",
"sourceIdentifier": "psirt@amd.com"
}