CVE-2025-57808
CVSS v3
8.1
HIGH
EPSS Score
1.6 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- esphomePyPIall versions · fixed in 2025.8.1
Vendor advisories
- CVE-2025-57808 Red Hat Product Security
esphome: ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header
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.
Technical details
- Published
- 2025-09-02
Frequently asked questions
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Related vulnerabilities
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