CVE-2026-127274: Linksys EA8100 CheckAdminPassword excessive authentication
A vulnerability was found in Linksys EA8100 1.0.3.216940. This vulnerability affects unknown code of the file /jnap/core/CheckAdminPassword. The manipulation results in improper restriction of excessive authentication attempts. The attack may be performed from remote. The attack requires a high level of complexity. It is stated that the exploitability is difficult. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Event History
Frequently Asked Questions
What systems are exposed to this issue?
The affected product identified is Linksys EA8100 running version 1.0.3.216940. The vulnerable functionality is associated with the /jnap/core/CheckAdminPassword endpoint.
Does exploiting this require credentials or local access?
The attack can be performed remotely and does not require privileges or user interaction. However, exploitation is described as high complexity and difficult.
What is the practical impact of the vulnerability?
The issue permits improper restriction of excessive authentication attempts, which may allow repeated attempts against the administrator password-checking functionality. The reported impact is limited to confidentiality, with no integrity or availability impact stated.
Is public exploit code available?
Yes. The exploit has been made public and could be used.