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CRITICAL · 9.8

CVE-2021-27952

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.

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
EcobeeEcobee3 Lite Firmware4.5.81.200
EcobeeEcobee3 Lite-

Related Weaknesses (CWE)

CWE-798

References

FAQ

What is CVE-2021-27952?

CVE-2021-27952 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.

How severe is CVE-2021-27952?

CVE-2021-27952 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-27952?

Check the references section above for vendor advisories and patch information. Affected products include: Ecobee Ecobee3 Lite Firmware, Ecobee Ecobee3 Lite.