| Shelly 1 Gen3 (S3SW-001X16EU)
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Security Grade
Calculator v
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Shelly 1 Gen3 (S3SW-001X16EU)
Release Date: 2024-05-30 • Status:
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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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None
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🔗 Proof
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No model-specific published hardware-tampering incident was found in the reviewed advisories. The wall-box relay and exposed terminals require physical installation security; this is a provisional incident-frequency rating.
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| Known vulnerabilities
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Rare
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🔗 Proof
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Shelly Gen2+ firmware 2.0.0 fixed an OTA authentication bypass. This is platform-wide evidence; direct exposure of Shelly 1 Gen3 is not established.
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| Prior attacks
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None
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🔗 Proof
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No Shelly 1 Gen3 attack is documented in the reviewed manufacturer advisory index. Absence of a report does not establish that attacks never occurred.
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| Updatability
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Very common
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🔗 Proof
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The model-specific web interface guide documents checking and installing firmware; Shelly update policy covers Gen3 devices.
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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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Partial
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🔗 Proof
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HTTP and WebSocket support SHA-256 digest authentication when enabled. MQTT, UART and outbound WebSocket are outside this mechanism; integration settings matter.
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| Communications
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Encrypted with up-to-date encryption
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🔗 Proof
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Firmware 2.0+ enforces HTTPS/WSS for the local web server and validates outbound TLS. Rating assumes updated firmware and secure integration settings; optional protocols may differ.
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| Storage
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Encrypted with up-to-date encryption
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🔗 Proof
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Shelly documents encrypted flash for security assets on newly produced devices. Early Shelly 1 Gen3 units date to 2024 and may not have this protection; score applies only to a newly produced unit.
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| Category Score
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Score: 2 / 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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Basic
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🔗 Proof
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The local device has a configurable password for a fixed admin identity. Separate local user roles and privilege levels are not documented.
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| Authentication
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Secure
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🔗 Proof
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When enabled, local HTTP/WebSocket uses RFC 7616 SHA-256 digest. Rating assumes firmware 2.0+ and completed secure setup; some communication channels remain outside it.
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| Brute-force protection
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Exist
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🔗 Proof
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Firmware 2.0+ provides progressive delays, rate limits and account lockout after repeated failed logins. Older firmware may differ.
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| Event logging
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Partial logging
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🔗 Proof
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The model-specific web interface offers debug logs, but the reviewed documentation does not establish complete login and access auditing.
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| Passwords
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Require change after setup
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🔗 Proof
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For firmware 2.0+, Shelly says the admin password must be configured during the 15-minute setup window. No password-complexity requirement is established; this form choice is approximate.
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| Category Score
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Score: 2 / 3
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Technical Specifications
| Property
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Details
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| Operating System & App
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Shelly Gen3 firmware (Companion App: Shelly Smart Control (optional))
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| Hardware (CPU / GPU)
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CPU: ESP-Shelly-C38F • GPU:
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| Memory & Storage
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Memory: • Storage: 8 MB flash
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| Power, Battery & Charging
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Battery: • Power: 110-240 V AC or 24-48 V DC or 12 V DC; <1.2 W; relay 16 A at 240 V AC • Charging:
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| Display & Camera
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Display: • Camera:
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| Sound & Connectivity
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Sound: • Connectivity: 2.4 GHz Wi-Fi 802.11 b/g/n; Bluetooth 4.2; MQTT
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| Physical (Dimensions & Mass)
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Dimensions: 37 x 42 x 16 mm • Mass: 26 g
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Shelly 1 Gen3 (S3SW-001X16EU) is a Wi-Fi/Bluetooth smart relay with dry contacts for controlling electrical loads. Documentation-based assessment reviewed 23 October 2026; no physical unit was tested. The 30 May 2024 date marks the manufacturer's public unveiling, not a verified retail launch date. Security ratings assume firmware 2.0+ with secure setup and integration settings. Encrypted flash for security assets is documented only for newly produced devices; early 2024 stock may differ. Hardware-tampering and past-attack ratings are provisional because no model-specific incidents were found in the reviewed advisories. A physical wall-box installation requires its own access control.
