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CVE-2021-41104

Estado: ModificadaAlta (7.5)—

ESPHome is a system to control the ESP8266/ESP32. Anyone with web_server enabled and HTTP basic auth configured on version 2021.9.1 or older is vulnerable to an issue in which `web_server` allows over-the-air (OTA) updates without checking user defined basic auth username & password. This issue is patched in version 2021.9.2. As a workaround, one may disable or remove `web_server`.

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)

Esphome — Esphome Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-41104",
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
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      "value": "ESPHome is a system to control the ESP8266/ESP32. Anyone with web_server enabled and HTTP basic auth configured on version 2021.9.1 or older is vulnerable to an issue in which `web_server` allows over-the-air (OTA) updates without checking user defined basic auth username & password. This issue is patched in version 2021.9.2. As a workaround, one may disable or remove `web_server`."
    },
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      "lang": "es",
      "value": "ESPHome es un sistema para controlar el ESP8266/ESP32. Cualquiera que tenga web_server habilitado y la autenticación básica HTTP configurada en la versión 2021.9.1 o anterior, es vulnerable a un problema en el que \"web_server\" permite actualizaciones over-the-air (OTA) sin comprobar el nombre de usuario y la contraseña de autenticación básica definidos por el usuario. Este problema ha sido parcheado en la versión 2021.9.2. Como solución, se puede deshabilitar o eliminar \"web_server\""
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  "lastModified": "2026-06-17T04:07:52.940",
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