CVE-2021-27952

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Hardcoded default root credentials exist on the ecobee3 lite 4.5.81.200 device. This allows a threat actor to gain access to the password-protected bootloader environment through the serial console.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-798

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devicesExploit, Third Party Advisory
https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devicesExploit, Third Party Advisory

Timeline

Published: Aug 3, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

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