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| Google Nest Thermostat G4CVZ
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Security Grade
Calculator v
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Google Nest Thermostat
Release Date: 2020-10-12 • Status: In sale
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Security Evaluation
1. Device Security
| Criterion
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Value
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Proof
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Comment
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| Known hardware tampering
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Rare
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🔗 Proof
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| Known vulnerabilities
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Rare
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🔗 Proof
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| Prior attacks
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Rare
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🔗 Proof
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| Updatability
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Very common
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🔗 Proof
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| Category Score
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Score: 2 / 3
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2. System Security
| Criterion
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Value
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Proof
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Comment
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| Authentication with other systems
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Full
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🔗 Proof
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| Communications
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Encrypted with up-to-date encryption
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🔗 Proof
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| Storage
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Encrypted with up-to-date encryption
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🔗 Proof
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| Category Score
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Score: 1 / 3
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3. User Authentication
| Criterion
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Value
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Proof
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Comment
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| Account management
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Full
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🔗 Proof
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| Authentication
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Secure
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🔗 Proof
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| Brute-force protection
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Exist
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🔗 Proof
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| Event logging
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Access event logged
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🔗 Proof
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| Passwords
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Require change after setup with complexity requirements
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🔗 Proof
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| Category Score
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Score: 1 / 3
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Technical Specifications
| Property
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Details
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| Operating System & App
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Nest OS (Companion App: Google Home)
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| Hardware (CPU / GPU)
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CPU: ARM Cortex-M4 • GPU:
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| Memory & Storage
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Memory: 256MB RAM • Storage: 512MB Flash
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| Power, Battery & Charging
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Battery: Rechargeable lithium battery • Power: 24V AC HVAC power • Charging: Charged via HVAC circuit
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| Display & Camera
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Display: E Ink / LCD segment display • Camera: No camera
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| Sound & Connectivity
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Sound: No speaker or microphone • Connectivity: Wi‑Fi 2.4GHz /5GHz, Bluetooth
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| Physical (Dimensions & Mass)
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Dimensions: 96 x 96 x 12 mm • Mass: 118g
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Nest Thermostat is a smart heating and cooling controller. It learns user temperature habits and adjusts automatically. It connects to Google Home cloud and mobile app. Risks include cloud account hijacking which may lead to unauthorized modification of temperature settings. Google maintains regular security updates and TLS encryption for communication.
