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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linksys E5600 affected
Version Status Constraints
1.1.0.26 affected —

No data.

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Project Subscriptions

Vendors Products
Linksys Subscribe
E5600 Firmware Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Zimo-666/E5600-cves/tree/main/05-fqc-info-disclosure cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-121618 cve-icon cve-icon
https://vuldb.com/submit/1023314 cve-icon cve-icon
https://vuldb.com/vuln/430466 cve-icon cve-icon
https://vuldb.com/vuln/430466/cti cve-icon cve-icon
https://www.linksys.com/ cve-icon cve-icon
History

Wed, 04 Nov 2026 03:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Linksys E5600 Factory Quality Control fqc.cgi information disclosure
First Time appeared Linksys
Linksys e5600 Firmware
Weaknesses CWE-200
CWE-284
CPEs cpe:2.3:o:linksys:e5600_firmware:*:*:*:*:*:*:*:*
Vendors & Products Linksys
Linksys e5600 Firmware
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C'}

cvssV3_1

{'score': 5.3, 'vector': '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'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-11-04T03:00:19.621Z

Reserved: 2026-11-03T16:40:01.989Z

Link: CVE-2026-121618

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-04T03:17:15.507

Modified: 2026-11-04T03:17:15.683

Link: CVE-2026-121618

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses