CVE-2026-52748

The Kaon AR2140X router contains a vulnerability where the backup functionality is accessible without authentication. This allows an unauthenticated remote attacker to trigger a configuration backup and retrieve it in a form encrypted by a device-specific key. Triggering this function renders the router inoperable for a substantial period of time. This issue was identified in firmware versions up to 4.2.17. Status of newer versions remains unknown.

A remote attacker can obtain a copy of the router's configuration, potentially revealing sensitive information, and also cause device unavailability, disrupting network operations.

It is recommended to restrict external access to the router, monitor for unauthorized activities, and contact the vendor for information about patches.