What is CVE-2021-27952?

CVE-2021-27952 is a critical-severity vulnerability in Ecobee Ecobee3 Lite, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2021-08-03.

How severe is CVE-2021-27952?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Ecobee Ecobee3 Lite

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.

EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ecobee Ecobee3_lite
Ecobee Ecobee3_lite_firmware — versions 4.5.81.200
N/a — versions n/a

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27952?: CVE-2021-27952 is a critical-severity vulnerability in Ecobee Ecobee3 Lite, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2021-08-03.
How severe is CVE-2021-27952?: Critical severity. CVSS v3 base score is 9.8 out of 10.