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CVE-2021-4471

Estado: AplazadaAlta (8.7)—

TG8 Firewall exposes a directory such as /data/ over HTTP without authentication. This directory stores credential files for previously logged-in users. A remote unauthenticated attacker can enumerate and download files within the directory to obtain valid account usernames and passwords, leading to loss of confidentiality and further unauthorized access.

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:N/PR:N permite acceso remoto sin autenticación a directorio HTTP expuesto (T1190). El atacante obtiene archivos de credenciales (T1552.001) para acceso a cuentas válidas (T1078.001).

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

Password PoliciesVulnerability ScanningUser TrainingRestrict File and Directory PermissionsPrivileged Account ManagementNetwork Segmentation

Tecnologías afectadas (1)

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

TG8 — FirewallAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-4471",
  "cveTags": [
    {
      "tags": [
        "unsupported-when-assigned"
      ],
      "sourceIdentifier": "disclosure@vulncheck.com"
    }
  ],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-4471",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-11-17T20:44:39.928640Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "disclosure@vulncheck.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 8.7,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "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"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "disclosure@vulncheck.com",
      "affectedData": [
        {
          "vendor": "TG8",
          "product": "TG8 Firewall",
          "versions": [
            {
              "status": "affected",
              "version": "0"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2025-11-14T23:15:43.270",
  "references": [
    {
      "url": "https://ssd-disclosure.com/ssd-advisory-tg8-firewall-preauth-rce-and-password-disclosure/",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://web.archive.org/web/20211024224240/http://www.tg8security.com/",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.vulncheck.com/advisories/tg8-firewall-unauthenticated-user-password-disclosure",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://ssd-disclosure.com/ssd-advisory-tg8-firewall-preauth-rce-and-password-disclosure/",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "disclosure@vulncheck.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-538"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "TG8 Firewall exposes a directory such as /data/ over HTTP without authentication. This directory stores credential files for previously logged-in users. A remote unauthenticated attacker can enumerate and download files within the directory to obtain valid account usernames and passwords, leading to loss of confidentiality and further unauthorized access."
    }
  ],
  "lastModified": "2026-06-17T04:19:49.653",
  "sourceIdentifier": "disclosure@vulncheck.com"
}