---
id: CVE-2026-121618
title: Linksys E5600 Factory Quality Control fqc.cgi information disclosure
summary: >-
  A weakness has been identified in Linksys E5600 1.1.0.26. This affects an
  unknown part of the file /cgi-bin/fqc.cgi of the component Factory Quality
  Control. This manipulation causes information disclosure. Remote exploitation
  of the att…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-200
  - CWE-284
vendor: Linksys
product: E5600
affected:
  - E5600 1.1.0.26
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T03:00:19.621Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121618'
references:
  - url: 'https://vuldb.com/vuln/430466'
    label: >-
      VDB-430466 | Linksys E5600 Factory Quality Control fqc.cgi information
      disclosure
  - url: 'https://vuldb.com/vuln/430466/cti'
    label: 'VDB-430466 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-121618'
    label: CVE-2026-121618 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1023314'
    label: 'Submit #1023314 | Linksys E5600 1.1.0.26 Information Disclosure (CWE-200)'
  - url: 'https://github.com/Zimo-666/E5600-cves/tree/main/05-fqc-info-disclosure'
  - url: 'https://www.linksys.com/'
tags:
  - cve.org
epss: 0.00752
epssPercentile: 0.55287
ingestedAt: '2026-11-05T20:33:06.663Z'
---

## Overview

A weakness has been identified in Linksys E5600 1.1.0.26. This affects an unknown part of the file /cgi-bin/fqc.cgi of the component Factory Quality Control. This manipulation causes information disclosure. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.

## Affected

- `E5600 1.1.0.26`

## Remediation

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