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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 57%
VendorProductVersion
ecobeeecobee3_lite_firmware
4.5.81.200
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devices
https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devices