CVE-2026-52749 Improper Authentication in Kaon AR2140X
Remote attackers can bypass authentication to obtain valid session cookies and force the router to issue arbitrary GET requests, potentially leading to further compromise.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-52749?
CVE-2026-52749 is a medium-severity authentication bypass vulnerability in Kaon AR2140, published on 28 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-52749?
How do I fix CVE-2026-52749?
No fix has been published for CVE-2026-52749 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-52749 being exploited?
There is no known exploitation of CVE-2026-52749 in the wild and no public exploit code.
Sources
Also known as GHSA-rmcq-5353-m59x.