CVE-2021-41104

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CVSS 3.1

7.5 high

EPSS

1%p67

Published

Sep 28, 2021 (Sep 28, 2021)

Modified

Jun 17, 2026

Description

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`.

Vendors: esphome
Products: esphome firmware
Weakness: CWE-306
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (1.2%)

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