CVE-2026-52748
Received Received - Intake

Unauthenticated Configuration Backup in Kaon AR2140X Router

Publication date: 2026-09-28

Last updated on: 2026-09-28

Assigner: CERT.PL

Description
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.

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Meta Information

Published
2026-09-28
Last Modified
2026-09-28
Generated
2026-09-28
AI Q&A
2026-09-28
EPSS Evaluated
N/A
NVD
CVE-2026-52748
EUVD
EUVD-2026-88246

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
kaon ar2140x to 4.2.17 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

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Executive Summary

The Kaon AR2140X router has a flaw where its backup function can be accessed without authentication. An attacker can remotely trigger a configuration backup and retrieve it in an encrypted form using a device-specific key. This causes the router to become temporarily inoperable.

Detection Guidance

To detect this vulnerability, scan your network for Kaon AR2140X routers with firmware versions up to 4.2.17. Check if the backup functionality is accessible without authentication by attempting to trigger a configuration backup remotely.

Impact Analysis

An unauthenticated attacker could exploit this to disable your router, causing network downtime. They could also retrieve encrypted configuration data, potentially leading to further attacks if the encryption is weak or device-specific.

Compliance Impact

This vulnerability may impact compliance by allowing unauthorized access to network configurations, potentially exposing sensitive data. Organizations must ensure routers are patched to avoid violations of data protection standards like GDPR or HIPAA.

Mitigation Strategies

Immediately update the router firmware to the latest version if available. If no update exists, restrict network access to the router by blocking external connections to its administrative interface until a patch is released.

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