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CVE-2020-6881

Estado: ModificadaAlta (7.5)—

ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:<ZXHN E8810, ZXHN E8820, ZXHN E8822><E8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13>

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 (3)

ZTE — Zxhn E8810 FirmwareZTE — Zxhn E8820 FirmwareZTE — Zxhn E8822 Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-6881",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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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,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/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"
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        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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  "affected": [
    {
      "source": "psirt@zte.com.cn",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "<ZXHN E8810, ZXHN E8820, ZXHN E8822>",
          "versions": [
            {
              "status": "affected",
              "version": "<E8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L,  E8820 V2.0.13, E8822 V2.0.13>"
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  "published": "2020-12-21T18:15:16.713",
  "references": [
    {
      "url": "http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014202",
      "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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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-346"
        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:<ZXHN E8810, ZXHN E8820, ZXHN E8822><E8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13>"
    },
    {
      "lang": "es",
      "value": "Los enrutadores de la serie ZTE E8810/E8820/E8822, presentan una vulnerabilidad de DoS de MQTT, que es causada por el fallo del dispositivo para verificar la validez de mensajes anormales.&#xa0;Un atacante remoto podría conectarse al servidor MQTT y enviar un mensaje de excepción MQTT al dispositivo especificado, lo que causará que el dispositivo deniegue el servicio.&#xa0;Esto afecta a: (ZXHN versión E8810, ZXHN versión E8820, ZXHN versión E8822)(E8810 versión V1.0.26, E8810 versión V2.0.1, E8820 versión V1.1.3L, E8820 versión V2.0.13, E8822 versión V2.0.13)"
    }
  ],
  "lastModified": "2026-06-17T03:23:58.233",
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