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CVE-2026-52749— Improper Authentication in Kaon AR2140X

Quick assessment

Affected
Kaon AR2140
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kaon AR2140X 路由器在对未认证的 HTTP 请求进行响应时，不当地区分并颁发会话 Cookie。该漏洞允许远程攻击者在未提供凭据的情况下获取有效的会话标识符，从而实现身份验证绕过。利用此访问权限，攻击者可以针对升级相关功能执行未经授权的恶意操作。这些操作可被滥用，强制路由器向任意选定的域名发起 GET 请求。 该问题已在固件版本 4.2.17 及更早版本中被发现，较新版本的状况目前尚不明确。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-52749

Vulnerability Information
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Vulnerability Title
Improper Authentication in Kaon AR2140X
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kaon AR2140 0 ~ 4.2.17 -

II. Public POCs for CVE-2026-52749

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III. Intelligence Information for CVE-2026-52749

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Other References for CVE-2026-52749 (1)

IV. Related Vulnerabilities

Same product: AR2140
Same vendor: Kaon
Same weakness: CWE-287

V. Comments for CVE-2026-52749

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