CVE-2021-27952
CRITICAL
9.8
CVSS Score
Published: August 3, 2021 at 02:31 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
2 products affected across 1 vendorECOBEE3 Lite FirmwareEcobee3 Lite
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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ecobee3 Lite· Ecobeedevice
80%All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (1)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devicesCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-798
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