{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-25T02:46:36.888","vulnerabilities":[{"cve":{"id":"CVE-2021-38549","sourceIdentifier":"cve@mitre.org","published":"2021-08-11T16:15:07.420","lastModified":"2026-06-17T04:02:20.847","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"MIRACASE MHUB500 USB splitters 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 splitters USB MIRACASE MHUB500 hasta el 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, 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 mediciones obtenidas por un sensor electro-óptico dirigido al LED indicador de potencia del divisor USB, podemos recuperar el sonido reproducido por los altavoces conectados"}],"affected":[{"source":"cve@mitre.org","affectedData":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:N/A:N","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:benda:miracase_hmub500_firmware:*:*:*:*:*:*:*:*","versionEndIncluding":"2021-08-09","matchCriteriaId":"F012CBB5-C421-45E6-9682-488D87880294"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:benda:miracase_hmub500:-:*:*:*:*:*:*:*","matchCriteriaId":"3718EF70-E7E0-47E6-9134-AECD7B1A8812"}]}]}],"references":[{"url":"https://www.nassiben.com/glowworm-attack","source":"cve@mitre.org","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.nassiben.com/glowworm-attack","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"]}]}}]}