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CVE-2026-20893

Estado: AplazadaAlta (8.5)—

Origin validation error issue exists in Fujitsu Security Solution AuthConductor Client Basic V2 2.0.25.0 and earlier. If this vulnerability is exploited, an attacker who can log in to the Windows system where the affected product is installed may execute arbitrary code with SYSTEM privilege and/or modify the registry value.

CVSS

Probabilidad de explotación (EPSS)

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.

AV:L + PR:L sin interacción = escalada local (T1068). CWE-346 (origin validation) y descripción permiten ejecución como SYSTEM y modificación de registro, sugiriendo T1059 y T1012.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Fujitsu — Security Solution Authconductor Client BasicAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-20893",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20893",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-07T14:38:13.907901Z"
        }
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    "cvssMetricV30": [
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          "attackVector": "LOCAL",
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          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
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      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "vultures@jpcert.or.jp",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
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          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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          "vendor": "Fujitsu Client Computing Limited",
          "product": "Fujitsu Security Solution AuthConductor Client Basic V2",
          "versions": [
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              "version": "2.0.25.0 and earlier"
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  ],
  "published": "2026-01-07T12:17:08.023",
  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN24626628/",
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://www.fmworld.net/biz/common/info/202601acc/",
      "source": "vultures@jpcert.or.jp"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
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      "description": [
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          "value": "CWE-346"
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  ],
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    {
      "lang": "en",
      "value": "Origin validation error issue exists in Fujitsu Security Solution AuthConductor Client Basic V2 2.0.25.0 and earlier. If this vulnerability is exploited, an attacker who can log in to the Windows system where the affected product is installed may execute arbitrary code with SYSTEM privilege and/or modify the registry value."
    },
    {
      "lang": "es",
      "value": "Un problema de error de validación de origen existe en Fujitsu Security Solution AuthConductor Client Basic V2 2.0.25.0 y versiones anteriores. Si esta vulnerabilidad es explotada, un atacante que puede iniciar sesión en el sistema Windows donde el producto afectado está instalado podría ejecutar código arbitrario con privilegios de SYSTEM y/o modificar el valor del registro."
    }
  ],
  "lastModified": "2026-06-17T10:18:00.113",
  "sourceIdentifier": "vultures@jpcert.or.jp"
}