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CVE-2021-46686

Estado: AplazadaCrítica (9.8)—

Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.

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.

Vector CVSS red sin autenticación (AV:N/PR:N/UI:N) indicativo de T1190. CWE-78 (OS Command Injection) en CGI expuesto permite ejecutar comandos arbitrarios (T1059) con máxima confianza (C:H/I:H/A:H).

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 ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (2)

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

Acmailer — Acmailer DBAIAcmailer — CGIAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-46686",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-46686",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-18T15:40:35.495948Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "vultures@jpcert.or.jp",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "Extra Innovation Inc.",
          "product": "acmailer CGI",
          "versions": [
            {
              "status": "affected",
              "version": "ver.4.0.3 and earlier"
            }
          ]
        },
        {
          "vendor": "Extra Innovation Inc.",
          "product": "acmailer DB",
          "versions": [
            {
              "status": "affected",
              "version": "ver.1.1.5 and earlier"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-02-18T00:15:20.757",
  "references": [
    {
      "url": "https://acmailer.jp/info/de.cgi?id=103",
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://jvn.jp/en/jp/JVN96957439/",
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://www.acmailer.jp/info/de.cgi?id=102",
      "source": "vultures@jpcert.or.jp"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "vultures@jpcert.or.jp",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker."
    },
    {
      "lang": "es",
      "value": "Existe una neutralización inadecuada de elementos especiales utilizados en un problema de comando OS ('inyección de comandos de os') en ACMailer CGI ver.4.0.3 y antes y Acmailer DB Ver.1.1.5 y anterior. Si se explota esta vulnerabilidad, un atacante puede ejecutar un comando arbitrario del sistema operativo."
    }
  ],
  "lastModified": "2026-06-17T04:15:23.460",
  "sourceIdentifier": "vultures@jpcert.or.jp"
}