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CVE-2021-21728

Estado: ModificadaMedia (5.3)—

A ZTE product has a configuration error vulnerability. Because a certain port is open by default, an attacker can consume system processing resources by flushing a large number of packets to the port, and successfully exploiting this vulnerability could reduce system processing capabilities. This affects: ZXA10 C300M all versions up to V4.3P8.

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)

ZTE — Zxa10 C300m Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-21728",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 1.4,
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  "affected": [
    {
      "source": "psirt@zte.com.cn",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "ZXA10 C300M",
          "versions": [
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              "status": "affected",
              "version": "all versions up to V4.3P8"
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  "published": "2021-04-09T18:15:13.833",
  "references": [
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      "url": "https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784",
      "tags": [
        "Vendor Advisory"
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      "source": "psirt@zte.com.cn"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-400"
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  "descriptions": [
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      "lang": "en",
      "value": "A ZTE product has a configuration error vulnerability. Because a certain port is open by default, an attacker can consume system processing resources by flushing a large number of packets to the port, and successfully exploiting this vulnerability could reduce system processing capabilities. This affects: ZXA10 C300M all versions up to V4.3P8."
    },
    {
      "lang": "es",
      "value": "Un producto ZTE presenta una vulnerabilidad de error de configuración. Debido a que un determinado puerto está abierto por defecto, un atacante puede consumir recursos de procesamiento del sistema al descargar una gran cantidad de paquetes en el puerto, y explotar con éxito esta vulnerabilidad podría reducir las capacidades de procesamiento del sistema. Esto afecta: ZXA10 C300M todas las versiones hasta V4.3P8"
    }
  ],
  "lastModified": "2026-06-17T03:36:03.040",
  "configurations": [
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