CVE•Published 2025-09-02•Modified 2026-10-19•1 article on news•6 live references•NVD data
CVE-2025-57808Esphome · Esphome_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
76
Exploit Prediction Scoring System · top 24% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-09-02
Modified 2026-10-19
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-57808Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Esphome Firmware"Hosts Shodan identified as running Esphome Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2025-57808Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-57808Censys host search filtered to this CVE id.
grep.app
CVE-2025-57808Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-57808GitHub code search for direct mentions.
Google dork
"CVE-2025-57808" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.