CVE-2025-57808

ESPHome is a system to control microcontrollers remotely through Home Automation systems. In version 2025.8.0 in the ESP-IDF platform, ESPHome's web_server authentication check can pass incorrectly when the client-supplied base64-encoded Authorization value is empty or is a substring of the correct value. This allows access to web_server functionality (including OTA, if enabled) without knowing any information about the correct username or password. This issue has been patched in version 2025.8.1.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5	Patch
https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635	Exploit Vendor Advisory
https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:esphome:esphome_firmware:2025.8.0:*:*:*:*:*:*:*

History

19 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) ESPHome es un sistema para controlar microcontroladores remotamente a través de sistemas de automatización del hogar. En la versión 2025.8.0 en la plataforma ESP-IDF, la comprobación de autenticación del web_server de ESPHome puede ser superada incorrectamente cuando el valor de autorización codificado en base64 proporcionado por el cliente está vacío o es una subcadena del valor correcto. Esto permite el acceso a la funcionalidad del web_server (incluyendo OTA, si está habilitado) sin conocer ninguna información sobre el nombre de usuario o la contraseña correctos. Este problema ha sido parcheado en la versión 2025.8.1.

Information

Published : 2025-09-02 01:15

Updated : 2026-10-19 17:10

NVD link : CVE-2025-57808

Mitre link : CVE-2025-57808

CVE.ORG link : CVE-2025-57808

JSON object : View

Products Affected

esphome

esphome_firmware

CWE

CWE-303

Incorrect Implementation of Authentication Algorithm

NVD-CWE-noinfo

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