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VULNERABILITIES

CVE-2021-41104 Details

Description

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 user defined basic auth username & password. This issue is patched in version 2021.9.2. As a workaround, one may disable or remove `web_server`.

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References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/esphome/esphome/pull/2409/commits/207cde1667d8c799a197b78ca8a5a14de8d5ca1e CVEPatchThird Party Advisory
https://github.com/esphome/esphome/releases/tag/2021.9.2 CVERelease NotesThird Party Advisory
https://github.com/esphome/esphome/security/advisories/GHSA-48mj-p7x2-5jfm CVEPatchThird Party Advisory
https://github.com/esphome/esphome/pull/2409/commits/207cde1667d8c799a197b78ca8a5a14de8d5ca1e [email protected]PatchThird Party Advisory
https://github.com/esphome/esphome/releases/tag/2021.9.2 [email protected]Release NotesThird Party Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-306Missing Authentication for Critical Function[email protected]
CWE-306Missing Authentication for Critical Function[email protected]

Affected Products

ProductVersions
esphome esphome firmware
< 2021.9.2

CPE

  • cpe:2.3:o:esphome:esphome_firmware:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
espressif esp32
All versions

CPE

  • cpe:2.3:h:espressif:esp32:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
espressif esp8266
All versions

CPE

  • cpe:2.3:h:espressif:esp8266:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-41104
NVD Published Date:
Sep 28, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-41104 Details - Not Deferred