---
id: CVE-2026-127274
title: Linksys EA8100 CheckAdminPassword excessive authentication
summary: >-
  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 attac…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-307
  - CWE-799
vendor: Linksys
product: EA8100
affected:
  - EA8100 1.0.3.216940
published: '2026-11-12'
updated: '2026-11-12'
sourceUpdated: '2026-11-12T23:30:14.359Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-127274'
references:
  - url: 'https://vuldb.com/vuln/436429'
    label: VDB-436429 | Linksys EA8100 CheckAdminPassword excessive authentication
  - url: 'https://vuldb.com/vuln/436429/cti'
    label: 'VDB-436429 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-127274'
    label: CVE-2026-127274 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1040995'
    label: >-
      Submit #1040995 | Linksys EA8100 Router firmware 1.0.3.216940 Improper
      Restriction of Excessive Authentication Attempts
  - url: >-
      https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-2-no-rate-limiting-or-lockout-on-admin-authentication-jnap-checkadminpassword
  - url: 'https://www.linksys.com/'
tags:
  - cve.org
ingestedAt: '2026-11-13T00:18:16.523Z'
---

## Overview

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.

## Affected

- `EA8100 1.0.3.216940`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.