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CVE-2020-9057

Status: ModifiedHigh (8.8)—

Z-Wave devices based on Silicon Labs 100, 200, and 300 series chipsets do not support encryption, allowing an attacker within radio range to take control of or cause a denial of service to a vulnerable device. An attacker can also capture and replay Z-Wave traffic. Firmware upgrades cannot directly address this vulnerability as it is an issue with the Z-Wave specification for these legacy chipsets. One way to protect against this vulnerability is to use 500 or 700 series chipsets that support Security 2 (S2) encryption. As examples, the Linear WADWAZ-1 version 3.43 and WAPIRZ-1 version 3.43 (with 300 series chipsets) are vulnerable.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (5)

Linear — Wadwaz-1Linear — Wapirz-1Silabs — 100 Series FirmwareSilabs — 200 Series FirmwareSilabs — 300 Series Firmware

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-9057",
  "cveTags": [],
  "metrics": {
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          "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
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          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
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        "acInsufInfo": false,
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          "userInteraction": "NONE",
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  "affected": [
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      "affectedData": [
        {
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            {
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  "published": "2022-01-10T14:10:16.150",
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      "tags": [
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      "source": "cret@cert.org"
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      "description": [
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      "value": "Z-Wave devices based on Silicon Labs 100, 200, and 300 series chipsets do not support encryption, allowing an attacker within radio range to take control of or cause a denial of service to a vulnerable device. An attacker can also capture and replay Z-Wave traffic. Firmware upgrades cannot directly address this vulnerability as it is an issue with the Z-Wave specification for these legacy chipsets. One way to protect against this vulnerability is to use 500 or 700 series chipsets that support Security 2 (S2) encryption. As examples, the Linear WADWAZ-1 version 3.43 and WAPIRZ-1 version 3.43 (with 300 series chipsets) are vulnerable."
    },
    {
      "lang": "es",
      "value": "Los dispositivos Z-Wave basados en los conjuntos de chips de las series 100, 200 y 300 de Silicon Labs no admiten cifrado, permitiendo a un atacante dentro del alcance de la radio tomar el control o causar una denegación de servicio en un dispositivo vulnerable. Un atacante también puede capturar y reproducir el tráfico Z-Wave. Las actualizaciones de firmware no pueden abordar directamente esta vulnerabilidad, ya que es un problema con la especificación Z-Wave para estos conjuntos de chips heredados. Una forma de protegerse contra esta vulnerabilidad es usar los conjuntos de chips de las series 500 o 700 que soportan el cifrado de Seguridad 2 (S2). Como ejemplos, el Linear WADWAZ-1 versión 3.43 y WAPIRZ-1 versión 3.43 (con chipsets de la serie 300) son vulnerables"
    }
  ],
  "lastModified": "2026-06-17T03:27:25.283",
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