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CVE-2019-3924

Estado: AnalizadaAlta (7.5)—💥 Exploit

MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Tecnologías afectadas (1)

Mikrotik — Routeros

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-3924",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "vulnreport@tenable.com",
      "affectedData": [
        {
          "vendor": "Tenable",
          "product": "MikroTik RouterOS",
          "versions": [
            {
              "status": "affected",
              "version": "RouterOS long-term 6.42.11 and below, RouterOS stable 6.43.11 and below"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-02-20T20:29:03.047",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/107177",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "vulnreport@tenable.com"
    },
    {
      "url": "https://www.exploit-db.com/exploits/46444/",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "vulnreport@tenable.com"
    },
    {
      "url": "https://www.tenable.com/security/research/tra-2019-07",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "vulnreport@tenable.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/107177",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.exploit-db.com/exploits/46444/",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.tenable.com/security/research/tra-2019-07",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "vulnreport@tenable.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-441"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-441"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities."
    },
    {
      "lang": "es",
      "value": "MikroTik RouterOS, en versiones anteriores a la 6.43.12 (stable) y 6.42.12 (long-term), es vulnerable a una vulnerabilidad de intermediario. El software ejecutará peticiones de red definidas por el usuario a los clientes WAN y LAN. Un atacante no autenticado remoto puede emplear esta vulnerabilidad para omitir el firewall del router o para realizar actividades generales de escaneo de red."
    }
  ],
  "lastModified": "2026-06-17T02:35:52.330",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:mikrotik:routeros:*:*:*:*:ltr:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6ABE243E-294B-4E3F-87C1-B259C4F05E24",
              "versionEndExcluding": "6.42.12"
            },
            {
              "criteria": "cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "25FEA7BB-04B7-4B11-9BAB-C94D46A1CCAC",
              "versionEndExcluding": "6.43.12"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "vulnreport@tenable.com"
}