---
id: CVE-2026-127277
title: Linksys EA8100 SMB Service service_smbd.sh initialization
summary: >-
  A security flaw has been discovered in Linksys EA8100 1.0.3.216940. The
  affected element is an unknown function of the file etc/init.d/service_smbd.sh
  of the component SMB Service. Performing a manipulation of the argument
  ANON_ACCESS re…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-665
vendor: Linksys
product: EA8100
affected:
  - EA8100 1.0.3.216940
published: '2026-11-13'
updated: '2026-11-13'
sourceUpdated: '2026-11-13T00:30:22.324Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-127277'
references:
  - url: 'https://vuldb.com/vuln/436432'
    label: VDB-436432 | Linksys EA8100 SMB Service service_smbd.sh initialization
  - url: 'https://vuldb.com/vuln/436432/cti'
    label: 'VDB-436432 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-127277'
    label: CVE-2026-127277 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1040999'
    label: >-
      Submit #1040999 | Linksys EA8100 Router firmware 1.0.3.216940 Insecure
      Default Initialization of Resource
  - url: >-
      https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-5-smb-anonymous-access-mapped-to-the-admin-account-when-anonymous-access-is-enabled
  - url: 'https://www.linksys.com/'
tags:
  - cve.org
ingestedAt: '2026-11-13T01:19:02.067Z'
---

## Overview

A security flaw has been discovered in Linksys EA8100 1.0.3.216940. The affected element is an unknown function of the file etc/init.d/service_smbd.sh of the component SMB Service. Performing a manipulation of the argument ANON_ACCESS results in improper initialization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. 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.