CVE-2026-52748: Kaon AR2140

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Kaon AR2140: up to and including 4.2.17

Published 2026-09-28. Last modified 2026-09-28.