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CVE-2026-23566

Estado: AnalizadaMedia (6.5)—

A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to inject, tamper with, or forge log entries in \Nomad Branch.log via crafted data sent to the UDP network handler. This can impact log integrity and nonrepudiation.

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).

Tecnologías afectadas (1)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-23566",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23566",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-01-29T15:56:46.401061Z"
        }
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    ],
    "cvssMetricV31": [
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
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  "affected": [
    {
      "source": "psirt@teamviewer.com",
      "affectedData": [
        {
          "vendor": "TeamViewer",
          "modules": [
            "Content Distribution Service",
            "NomadBranch.exe"
          ],
          "product": "DEX",
          "versions": [
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              "status": "affected",
              "version": "0",
              "lessThan": "26.1",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Windows"
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          "defaultStatus": "unaffected"
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  ],
  "published": "2026-01-29T09:16:04.217",
  "references": [
    {
      "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@teamviewer.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "psirt@teamviewer.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to inject, tamper with, or forge log entries in \\Nomad Branch.log via crafted data sent to the UDP network handler. This can impact log integrity and nonrepudiation."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en TeamViewer DEX Client (anteriormente 1E Client) - Servicio de Distribución de Contenido (NomadBranch.exe) anterior a la versión 26.1 para Windows permite a un atacante en la red adyacente inyectar, manipular o falsificar entradas de registro en \\Nomad Branch.log a través de datos manipulados enviados al manejador de red UDP. Esto puede impactar la integridad del registro y la no repudiación."
    }
  ],
  "lastModified": "2026-06-17T10:21:47.227",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "26.1"
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  "sourceIdentifier": "psirt@teamviewer.com"
}