{"cve":"CVE-2025-57808","nvd":{"published":"2025-09-02T01:15:29.947","modified":"2026-10-19T17:10:00.173","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-303"],"references":["https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5","https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635","https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635"],"products":["esphome:esphome_firmware"],"source":"nvd","synced_at":"2026-10-19T22:07:46.309729541+00:00"},"epss":{"cve":"CVE-2025-57808","score":0.01542,"percentile":0.74761,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-mxh2-ccgj-8635","url":"https://osv.dev/vulnerability/GHSA-mxh2-ccgj-8635","summary":"ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header","modified":"2026-09-10T03:50:28.586980201Z","packages":[{"ecosystem":"PyPI","name":"esphome","purl":"pkg:pypi/esphome","ranges":["<2025.8.1"],"fixed":["2025.8.1"]}]},{"id":"PYSEC-2026-1330","url":"https://osv.dev/vulnerability/PYSEC-2026-1330","summary":"ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header","modified":"2026-07-07T17:46:44.705589787Z","packages":[{"ecosystem":"PyPI","name":"esphome","purl":"pkg:pypi/esphome","ranges":["<2025.8.1"],"fixed":["2025.8.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}