CVE-2026-52748

Missing authentication for backup functionality in Kaon AR2140X

Published Sep 28, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Kaongroup
Kaongroup ar2140
Vendors & Products Kaongroup
Kaongroup ar2140
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Missing authentication for backup functionality in Kaon AR2140X
First Time appeared Kaon
Kaon ar2140
Weaknesses CWE-306
CPEs cpe:2.3:a:kaon:ar2140:*:*:*:*:*:*:*:*
Vendors & Products Kaon
Kaon ar2140
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERT-PL
Published
Updated
Sep 28, 2026, 1:31 PM
Reserved
Jun 8, 2026, 2:40 PM
Status
Deferred
Published
Sep 28, 2026, 1:17 PM
Modified
Sep 28, 2026, 4:31 PM