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Documentation-based security assessment: Amazon Echo (4th Generation, C7H6T3). Reviewed 2026-10-24. Documentation-based assessment of a defined Alexa profile. The device is set up through the Alexa app on iOS/Android and bound to a single Amazon account; the Amazon account uses a password with Amazon's complexity policy but optional 2-Step Verification is not enabled in this profile. The default Alexa-over-TLS cloud channel is used; Zigbee hub, Amazon Sidewalk bridge and Bluetooth are enabled in hardware but no additional per-device mutual authentication is declared. The physical mic-off button is retained; when engaged it disconnects the microphones and shows a red ring. Firmware receives automatic OTA updates while connected. These are the explicitly selected conditions of this document assessment, not a claim about factory defaults or an inspected physical unit. Ratings map documented capabilities and the stated configuration to WikiIoT choices. Rare is a qualitative assessment of documented bounded exposure/history, not a measured frequency. Prior attacks is explicitly platform-level history; the cited CVEs concern Echo Dot / Alexa platform research, not a confirmed victim record for model C7H6T3, and some predate or overlap the 2020 release. Optional capabilities (e.g. 2FA, per-device Zigbee auth) are not treated as enabled unless the assessment configuration states so. Historical CVEs do not imply that the selected current firmware remains vulnerable. Release-date scope: 2020-09-24, the date stated in the body of the US Press Center launch announcement; not asserted to be the earliest worldwide retail date. Historical vulnerability: CVE-2022-25809 (improper neutralization of audio output from 3rd and 4th Generation Amazon Echo Dot; arbitrary voice command via malicious skill or paired malicious Bluetooth device, aka Alexa versus Alexa). CVE-2021-37436 (Echo Dot devices through 2021-07-02; physical access after factory reset can obtain sensitive information). Both are platform-level Alexa/Echo Dot research findings, not model-specific CVEs for C7H6T3; Amazon has stated mitigations and automatic updates. No physical device was tested. Keep the configuration and evidence scope with the ratings. References: [https://press.aboutamazon.com/2020/9/introducing-the-all-new-echo-family-reimagined-inside-and-out Amazon press release — all-new Echo family, 2020-09-24] [https://electronics.woot.com/offers/echo-4th-gen-smart-home-hub-with-alexa-14 Echo (4th Gen) retail spec sheet] [https://www.tsc.ca/Amazon-Echo-4th-Gen-with-Premium-Sound-Smart-Home-Hub/pages/productdetails?nav=R%3A251228 Echo (4th Gen) retail specs — MT8512 and 1 GB RAM] [https://www.bhphotovideo.com/c/product/1599238-REG/amazon_b085hk4kl6_echo_4th_gen_with.html B&H — Echo (4th Gen) includes 30 W power adapter] [https://www.aboutamazon.com/news/devices/busting-the-5-biggest-myths-about-amazons-alexa Amazon — Alexa myths, encryption and automatic updates] [https://www.aboutamazon.ca/news/devices/busting-the-4-biggest-myths-about-amazons-alexa Amazon — physical mic-off switch and voice history] [https://nvd.nist.gov/vuln/detail/cve-2022-25809 NVD — CVE-2022-25809 Alexa versus Alexa] [https://nvd.nist.gov/vuln/detail/cve-2021-37436 NVD — CVE-2021-37436 Echo Dot post-reset remnant] [https://arstechnica.com/gadgets/2021/07/passwords-in-amazon-echo-dots-live-on-even-after-you-factory-reset-them/ Ars Technica — Echo Dot factory-reset remnant coverage] [https://fehmijaafar.net/wiki-iot/index.php/Methodology WikiIoT methodology]
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