CVE-2021-38543

{
  "id": "CVE-2021-38543",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-11T16:15:07.210",
  "references": [
    {
      "url": "https://www.nassiben.com/glowworm-attack",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.nassiben.com/glowworm-attack",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "TP-Link UE330 USB splitter devices through 2021-08-09, in certain specific use cases in which the device supplies power to audio-output equipment, allow remote attackers to recover speech signals from an LED on the device, via a telescope and an electro-optical sensor, aka a \"Glowworm\" attack. We assume that the USB splitter supplies power to some speakers. The power indicator LED of the USB splitter is connected directly to the power line, as a result, the intensity of the USB splitter's power indicator LED is correlative to its power consumption. The sound played by the connected speakers affects the USB splitter's power consumption and as a result is also correlative to the light intensity of the LED. By analyzing measurements obtained from an electro-optical sensor directed at the power indicator LED of the USB splitter, we can recover the sound played by the connected speakers."
    },
    {
      "lang": "es",
      "value": "Los dispositivos splitter USB TP-Link UE330 hasta 09-08-2021, en determinados casos de uso en los que el dispositivo suministra energía a equipos de salida de audio, permiten a atacantes remotos recuperar las señales de voz de un LED del dispositivo, por medio de un telescopio y un sensor electro-óptico, también se conoce como un ataque \"Glowworm\". Suponemos que el divisor USB suministra energía a unos altavoces. El LED indicador de potencia del divisor USB está conectado directamente a la línea de alimentación, por lo que la intensidad del LED indicador de potencia del divisor USB es correlativa a su consumo de energía. El sonido reproducido por los altavoces conectados afecta al consumo de energía del divisor USB y, en consecuencia, también es correlativo a la intensidad luminosa del LED. Al analizar las medidas obtenidas por un sensor electro-óptico dirigido al LED indicador de potencia del splitter USB, podemos recuperar el sonido reproducido por los altavoces conectados"
    }
  ],
  "lastModified": "2026-06-17T04:02:19.997",
  "configurations": [
    {
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        {
          "negate": false,
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              "vulnerable": true,
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              "versionEndIncluding": "2021-08-09"
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  "sourceIdentifier": "cve@mitre.org"
}