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TI-2026-37866 Aliases CVE-2026-52748GHSA-vcfv-29fp-vc3c

Missing authentication for backup functionality in Kaon AR2140X

Priority LOW 31CWE-306Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00254 17th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
KAONAR2140up to 4.2.17—No fix listedCNA
  • AR2140 VendorKAON Affected up to 4.2.17 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-52748
  2. 2026-10-03 Alias added: GHSA-vcfv-29fp-vc3c

References

Advisory 1

  • TI-2024-08063 Kaon CG3000 dhcpcd Command cross site scripting CVSS 4.0MEDIUM 5.1
  • TI-2025-32314 Authentication bypass in KAON KCM3100 CVSS 4.0CRITICAL 9.3
  • TI-2025-06434 Hardcoded credentials in KAON CG3000T/CG3000CT routers CVSS 4.0CRITICAL 9.3
  • TI-2025-39228 Authenticated RCE in KAON PG5298 CVSS 4.0HIGH 8.5
  • TI-2026-05280 Missing Authentication for Critical Function in KAON PG5298 CVSS 4.0HIGH 7.1
  • TI-2026-37867 Improper Authentication in Kaon AR2140X CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences