| Philips Sonicare DiamondClean 9000 (HX9911/92)
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Security Grade
Calculator v1
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Philips Sonicare DiamondClean 9000 (HX9911/92)
Release Date: 2020-01-01 • 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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Teardown and hardware modification of this toothbrush is uncommon. The sealed handle makes tampering difficult and voids warranty.
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| Known vulnerabilities
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Rare
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🔗 Proof
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Few publicly disclosed CVEs targeting this specific model. Philips provides limited security firmware maintenance for the series.
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| Prior attacks
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None
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🔗 Proof
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No documented public real-world attacks targeting this Sonicare toothbrush model.
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| Updatability
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Rare
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🔗 Proof
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Firmware updates can only be pushed via the official Sonicare mobile app; updates are infrequent, mostly for functional bug fixes.
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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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BLE pairing uses simple device association with the official Sonicare App; no strong mutual certificate authentication.
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| Communications
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Encrypted with up-to-date encryption
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🔗 Proof
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BLE communication between toothbrush and Sonicare App uses standard BLE encryption for brushing data transmission
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| Storage
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No encryption
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🔗 Proof
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Local brushing history stored on the device’s flash storage is not encrypted. Sensitive oral health data is stored in the companion app/cloud instead.
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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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Account management is handled inside the Philips Sonicare mobile app, not on the toothbrush hardware itself.
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| Authentication
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Basic
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🔗 Proof
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User login happens on the companion app. The toothbrush itself has no local user login or authentication.
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| Brute-force protection
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Absent
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🔗 Proof
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The toothbrush BLE pairing interface does not implement brute force lockout or rate limiting
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| Event logging
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Partial logging
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🔗 Proof
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It logs brushing duration, mode and pressure events locally. No security audit / access event logs.
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| Passwords
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Default/Common/Easy to guess
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🔗 Proof
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The toothbrush hardware has no built-in password. Credentials belong to the cloud account in the Sonicare App.
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| Category Score
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Score: 3 / 3
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Technical Specifications
| Property
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Details
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| Operating System & App
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Proprietary embedded firmware (Companion App: Philips Sonicare App)
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| Hardware (CPU / GPU)
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CPU: Proprietary low-power MCU (not publicly specified) • GPU: None
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| Memory & Storage
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Memory: On-chip MCU RAM (not publicly specified) • Storage: On-chip flash for firmware & local brushing logs
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| Power, Battery & Charging
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Battery: Built-in Lithium-ion battery • Power: 100–240V universal input • Charging: Inductive glass charging + USB travel case charging
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| Display & Camera
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Display: No built-in display • Camera: None
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| Sound & Connectivity
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Sound: Buzzer for timer / pressure alert • Connectivity: Bluetooth Low Energy (BLE)
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| Physical (Dimensions & Mass)
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Dimensions: 256 × 28 mm (handle) • Mass: 130 g (handle only)
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This is a consumer BLE-connected smart electric toothbrush running closed proprietary embedded firmware. It pairs with the official Philips Sonicare mobile app over Bluetooth Low Energy to upload brushing records. The brush itself has no local display, camera or strong on-device authentication. Its attack surface is limited to BLE radio. Firmware updates are delivered only via the official mobile application and released rarely. Local stored brushing logs on the device are unencrypted.
