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CVE-2026-23567

Estado: AnalizadaMedia (6.5)—

An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets.

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)

Teamviewer — Digital Employee Experience

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-23567",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23567",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-29T15:56:32.513279Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@teamviewer.com",
        "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:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@teamviewer.com",
      "affectedData": [
        {
          "vendor": "TeamViewer",
          "modules": [
            "Content Distribution Service",
            "NomadBranch.exe"
          ],
          "product": "DEX",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "26.1",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Windows"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-01-29T09:16:04.340",
  "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": [
    {
      "type": "Secondary",
      "source": "psirt@teamviewer.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets."
    },
    {
      "lang": "es",
      "value": "Un desbordamiento inferior de entero en el manejador de comandos UDP del Cliente TeamViewer DEX (anteriormente Cliente 1E) - Servicio de Distribución de Contenido (NomadBranch.exe) anterior a la versión 26.1 para Windows permite a un atacante de red adyacente activar un desbordamiento de búfer basado en montículo y causar una denegación de servicio (caída del servicio) mediante paquetes UDP especialmente diseñados."
    }
  ],
  "lastModified": "2026-06-17T10:21:47.330",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "26.1"
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      "operator": "AND"
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  "sourceIdentifier": "psirt@teamviewer.com"
}