CVE-2021-36942

Estado: AnalizadaAlta (7.5)⚠ Explotación activa

Windows LSA Spoofing Vulnerability

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 66%
Percentil entre todas las CVEs puntuadas: 99
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).

CISA KEV — explotada activamente

Añadida al catálogo: 3/11/2021
Plazo de remediación: 17/11/2021
Uso conocido en ransomware: Known

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access92 %
Impacto principalT1556 Modify Authentication Processdefense impairment · persistence · credential access85 %
Impacto secundarioT1098 Account Manipulationpersistence · privilege escalation78 %

LSA spoofing en Windows Server permite falsificar identidades y modificar cuenta administrativas sin autenticación (AV:N/PR:N/UI:N). Impacta I:H según CVSS, compatible con T1556 (manipulación de autenticación) y T1098 (modificación de cuentas).

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

Privileged Account Management User Account Management Restrict File and Directory Permissions Operating System Configuration Network Segmentation Multi-factor Authentication

Tecnologías afectadas (6)

Microsoft — Windows Server 2004 Microsoft — Windows Server 2008 Microsoft — Windows Server 2012 Microsoft — Windows Server 2016 Microsoft — Windows Server 2019 Microsoft — Windows Server 20h2

CWE

NVD-CWE-Other

Referencias

JSON original (NVD)

Mostrar

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  "descriptions": [
    {
      "lang": "en",
      "value": "Windows LSA Spoofing Vulnerability"
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    {
      "lang": "es",
      "value": "Una Vulnerabilidad de suplantación de identidad en Windows LSA"
    }
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  "cisaActionDue": "2021-11-17",
  "cisaExploitAdd": "2021-11-03",
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}