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CVE-2026-52748

Missing authentication for backup functionality in Kaon AR2140X

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.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Kaon Kaongroup
Products
Ar2140 Ar2140
CVE-2026-52749

Improper Authentication in Kaon AR2140X

The Kaon AR2140X router improperly issues session cookies in responses to unauthenticated HTTP requests. This vulnerability allows a remote attacker to obtain a valid session identifier without providing credentials, resulting in an authentication bypass. With this access, the attacker can perform unauthorized actions on upgrade-related functionalities. These actions can be abused to force the router to issue GET requests to arbitrarily chosen domains. This issue was identified in firmware versions up to 4.2.17. Status of newer versions remains unknown.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Kaon
Products
Ar2140