High 8.1Published Sep 1, 2025

CVE-2025-57808ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header

Updated under an hour ago (Oct 27, 2026, 8:40 AM ET)

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Every CVE for esphome

Exploited in the last 30 days

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: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-303
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 2, 2025
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

esphome esphome esphome:esphome (from the name)	= 2025.8.0	CNA record
esphome esphome_firmware esphome:esphome_firmware	2025.8.0	NVD

References

References

https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635	x-refsource-confirm, exploit, vendor-advisory
https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.