Vulnerability in Esphome
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 A…
EPSS: 0.015 (71.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Esphome — versions = 2025.8.0
- Esphome Esphome_firmware — versions 2025.8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-57808?
- CVE-2025-57808 is a high-severity vulnerability in Esphome, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 8.1/10. Published 2025-09-02.
- How severe is CVE-2025-57808?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2025-57808 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.