Description
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.
Details
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| esphome | โ | 2025.8.1 |
| esphome-firmware | โ | โ |
References
Similar Threats
- Unknown CVE-2026-23833
- High CVE-2024-29019
- Unknown CVE-2024-27287
- High CVE-2024-27081
- High CVE-2021-41104
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