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CVE-2018-4851

Estado: ModificadaAlta (8.2)—

A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to the device could cause a Denial-of-Service condition by sending certain packets to the device, causing potential reboots of the device. The core functionality of the device could be impacted. The time serving functionality recovers when time synchronization with GPS devices or other NTP servers are completed.

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 (2)

Siemens — Siclock Tc100 FirmwareSiemens — Siclock Tc400 Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2018-4851",
  "cveTags": [],
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    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:C",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
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          "baseScore": 8.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
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        "impactScore": 4.2,
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  "affected": [
    {
      "source": "productcert@siemens.com",
      "affectedData": [
        {
          "vendor": "Siemens AG",
          "product": "SICLOCK TC100, SICLOCK TC400",
          "versions": [
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              "status": "affected",
              "version": "SICLOCK TC100 : All versions"
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  "published": "2018-07-03T14:29:00.227",
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      "url": "http://www.securityfocus.com/bid/104672",
      "tags": [
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        "VDB Entry"
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      "source": "productcert@siemens.com"
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    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-197012.pdf",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
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      "source": "productcert@siemens.com"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "productcert@siemens.com",
      "description": [
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          "lang": "en",
          "value": "CWE-399"
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-20"
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  ],
  "descriptions": [
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      "lang": "en",
      "value": "A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to the device could cause a Denial-of-Service condition by sending certain packets to the device, causing potential reboots of the device. The core functionality of the device could be impacted. The time serving functionality recovers when time synchronization with GPS devices or other NTP servers are completed."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en SICLOCK TC100 (todas las versiones) y SICLOCK TC400 (todas las versiones). Un atacante con acceso de red a los dispositivos podría provocar una condición de denegación de servicio (DoS) enviando determinados paquetes al dispositivo, provocando reinicios potenciales del dispositivo. La función principal del dispositivo se podría ver afectada. La funcionalidad time serving se recupera cuando se completa la sincronización del tiempo con los dispositivos GPS u otros servidores NTP."
    }
  ],
  "lastModified": "2026-06-17T01:59:10.210",
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