CVE-2021-27952 describes a critical vulnerability in the ecobee3 lite smart thermostat (firmware 4.5.81.200) due to hardcoded default root credentials. An attacker can exploit this by gaining access to the serial console, bypassing the bootloader's password protection. This vulnerability carries a CVSS score of 9.8 (Critical), indicating a severe risk with network-based attacks, low complexity, and complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, the presence of hardcoded credentials (CWE-798) presents a significant security flaw.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.5.81.200CPE matchmatch criteria | cpe:2.3:o:ecobee:ecobee3_lite_firmware:4.5.81.200:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.