CVE-2026-97787
La ejecución concurrente con un recurso compartido y una sincronización inadecuada ('condición de carrera') en el controlador de filtro del sistema de archivos de aislamiento de contenedores de Windows (unionfs.sys) permite a un atacante autorizado escalar privilegios localmente.
Traducción automática del texto original de NVD (en inglés).
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7
Probabilidad de explotación (EPSS)
FIRST aún no ha puntuado esta CVE (habitual en CVEs muy recientes o rechazadas).
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 %
Vector AV:L/PR:L/UI:N y descripción 'elevate privileges locally' en unionfs.sys (race condition, CWE-362): escalada local sin interacción; no hay impacto posterior explícito en el texto.
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
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-362
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-97787",
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{
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"ssvcData": {
"id": "CVE-2026-97787",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-13T19:31:47.705657Z"
}
}
],
"cvssMetricV31": [
{
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"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1
}
]
},
"affected": [
{
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],
"published": "2026-10-13T19:22:16.563",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97787",
"source": "secure@microsoft.com"
}
],
"vulnStatus": "Undergoing Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"description": [
{
"lang": "en",
"value": "CWE-362"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally."
}
],
"lastModified": "2026-10-13T20:19:40.283",
"sourceIdentifier": "secure@microsoft.com"
}