ZDI-26-558: (Pwn2Own) Amazon Smart Plug OTA Update Process Improper Certificate Validation Vulnerability
This vulnerability allows network-adjacent attackers to bypass certificate validation for OTA updates on affected installations of Amazon Smart Plug. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 6.8.
AI Analysis
Technical Summary
The Amazon Smart Plug contains a vulnerability in its over-the-air (OTA) update process where certificate validation is improperly performed. This allows network-adjacent attackers to bypass certificate validation when downloading updates, without requiring authentication. Exploiting this vulnerability could enable attackers to execute code on the device by leveraging this flaw in conjunction with other vulnerabilities. The issue was reported to Amazon on November 5, 2025, and publicly disclosed on August 12, 2026. The vulnerability is fixed in Amazon Smart Plug version 3.1.212.
Potential Impact
An attacker within network proximity can bypass certificate validation during OTA updates, potentially allowing unauthorized code execution on the affected Amazon Smart Plug device. This could compromise the integrity and availability of the device. No confidentiality impact is indicated. The vulnerability does not require user interaction or authentication to exploit.
Mitigation Recommendations
A fix is available in Amazon Smart Plug version 3.1.212. Users and administrators should update affected devices to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
ZDI-26-558: (Pwn2Own) Amazon Smart Plug OTA Update Process Improper Certificate Validation Vulnerability
Description
This vulnerability allows network-adjacent attackers to bypass certificate validation for OTA updates on affected installations of Amazon Smart Plug. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 6.8.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Amazon Smart Plug contains a vulnerability in its over-the-air (OTA) update process where certificate validation is improperly performed. This allows network-adjacent attackers to bypass certificate validation when downloading updates, without requiring authentication. Exploiting this vulnerability could enable attackers to execute code on the device by leveraging this flaw in conjunction with other vulnerabilities. The issue was reported to Amazon on November 5, 2025, and publicly disclosed on August 12, 2026. The vulnerability is fixed in Amazon Smart Plug version 3.1.212.
Potential Impact
An attacker within network proximity can bypass certificate validation during OTA updates, potentially allowing unauthorized code execution on the affected Amazon Smart Plug device. This could compromise the integrity and availability of the device. No confidentiality impact is indicated. The vulnerability does not require user interaction or authentication to exploit.
Mitigation Recommendations
A fix is available in Amazon Smart Plug version 3.1.212. Users and administrators should update affected devices to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-558/","fetched":true,"fetchedAt":"2026-08-12T20:03:19.392Z","wordCount":184}
Threat ID: 6a7cd317bf8831d5391487bf
Added to database: 08/12/2026, 20:09:59 UTC
Last enriched: 08/12/2026, 20:11:26 UTC
Last updated: 08/12/2026, 22:14:46 UTC
Views: 4
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