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CVE-2026-78135

Estado: AnalizadaAlta (7.3)—

libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.

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.

VPN/IKEv2 accesible remotamente sin autenticación requerida en el flujo (AV:N/PR:N). Bypass de autenticación permite obtener credenciales o acceso como usuario autenticado (T1078).

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

Tecnologías afectadas (1)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-78135",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-78135",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-15T15:32:40.015957Z"
        }
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              "version": "5.9.7",
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  "published": "2026-09-11T03:16:23.160",
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      "url": "https://github.com/strongswan/strongswan/releases/tag/6.1.0",
      "tags": [
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        "Vendor Advisory"
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      "source": "cve@mitre.org"
    },
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      "url": "https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html",
      "tags": [
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        "Mitigation"
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      "source": "cve@mitre.org"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-841"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass."
    }
  ],
  "lastModified": "2026-09-16T19:37:30.467",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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          "operator": "OR"
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  "sourceIdentifier": "cve@mitre.org"
}