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CVE-2026-75439

Estado: AplazadaAlta (7.5)—

An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component

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 AV:N/PR:N sin UI permite ataque remoto sin autenticación. CWE-476 (null pointer) causa DoS. Afecta UPF de Free5GC (aplicación de red expuesta).

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

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

Free5gc — Free5gcAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-75439",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-75439",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-14T13:10:31.465834Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-09-04T21:17:25.583",
  "references": [
    {
      "url": "https://gist.github.com/hackeryounow/0f434c03008462e6eec3b43ed3cd12d8",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/free5gc/free5gc/issues/1059",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/free5gc/free5gc/issues/1059.https://github.com/free5gc/go-upf/pull/97",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/free5gc/go-upf/pull/97",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/hackeryounow/5GCVulDB/tree/main/CVE-2026-75439",
      "source": "cve@mitre.org"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component"
    }
  ],
  "lastModified": "2026-09-14T14:17:09.723",
  "sourceIdentifier": "cve@mitre.org"
}