What is CVE-2021-41104?

CVE-2021-41104 is a high-severity vulnerability in Esphome, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2021-09-28.

How severe is CVE-2021-41104?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Esphome

CVE-2021-41104

ESPHome is a system to control the ESP8266/ESP32. Anyone with web_server enabled and HTTP basic auth configured on version 2021.9.1 or older is vulnerable to an issue in which `web_server` allows over-the-air (OTA) updates without checking…

Vulnerability class: Broken Authentication

EPSS: 0.012 (64.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2021-41104?: CVE-2021-41104 is a high-severity vulnerability in Esphome, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2021-09-28.
How severe is CVE-2021-41104?: High severity. CVSS v3 base score is 7.5 out of 10.