CVE-2026-52749: CWE-287 Improper Authentication in Kaon AR2140
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.
AI Analysis
Technical Summary
CVE-2026-52749 is an authentication bypass vulnerability in the Kaon AR2140X router caused by improper authentication (CWE-287). The router issues session cookies in response to unauthenticated HTTP requests, enabling remote attackers to obtain valid session identifiers without credentials. This unauthorized access allows attackers to perform actions on upgrade-related functionalities, which can be abused to make the router issue GET requests to arbitrary domains. The vulnerability affects firmware versions up to 4.2.17. No patch or remediation information is currently available.
Potential Impact
An attacker can bypass authentication and gain unauthorized access to upgrade-related functions on the affected router. This can lead to forced GET requests to arbitrary domains, potentially enabling further attacks or information leakage. The vulnerability has a CVSS 4.0 base score of 5.3, indicating a medium severity impact with network attack vector and no privileges or user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict network access to the router's management interface and monitor for suspicious activity related to upgrade functionalities.
CVE-2026-52749: CWE-287 Improper Authentication in Kaon AR2140
Description
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 v4.0
Score 5.3medium
Affected software
Kaon
AR2140
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-52749 is an authentication bypass vulnerability in the Kaon AR2140X router caused by improper authentication (CWE-287). The router issues session cookies in response to unauthenticated HTTP requests, enabling remote attackers to obtain valid session identifiers without credentials. This unauthorized access allows attackers to perform actions on upgrade-related functionalities, which can be abused to make the router issue GET requests to arbitrary domains. The vulnerability affects firmware versions up to 4.2.17. No patch or remediation information is currently available.
Potential Impact
An attacker can bypass authentication and gain unauthorized access to upgrade-related functions on the affected router. This can lead to forced GET requests to arbitrary domains, potentially enabling further attacks or information leakage. The vulnerability has a CVSS 4.0 base score of 5.3, indicating a medium severity impact with network attack vector and no privileges or user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict network access to the router's management interface and monitor for suspicious activity related to upgrade functionalities.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-06-08T14:40:31.450Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aba7026f7a7c54106c00b48
Added to database: 09/28/2026, 13:48:22 UTC
Last enriched: 09/28/2026, 14:03:15 UTC
Last updated: 09/29/2026, 02:50:15 UTC
Views: 16
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