TI-2026-84924 Aliases CVE-2026-121618 GHSA-h638-c7p9-c97g

Information disclosure in Linksys E5600 Factory Quality Control

LOW 32CWE-200Published 2026-11-04 · Updated 2026-11-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure, Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-284.

Summary

Linksys E5600 from 1.1.0.26 exposes sensitive information through an unknown part of /cgi-bin/fqc.cgi in its Factory Quality Control component (CWE-200). A remote attacker can trigger the disclosure without privileges or user interaction. A public exploit is available. The vendor did not respond to early disclosure, and only products no longer supported by the maintainer are affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

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.

Why it matters now

EPSS 0.00752 55th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linksys	E5600	1.1.0.26	—	No fix listed	CNA

E5600 VendorLinksys Affected 1.1.0.26 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:linksys:e5600_firmware::::::::	—	—	Linksys

cpe:2.3:o:linksys:e5600_firmware:*:*:*:*:*:*:*:* Versions — — ·Linksys

Remediation

The sources list no fixed version for Linksys E5600.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Timeline

2026-11-04 Threatist record created from CVE-2026-121618
2026-11-04 Alias added: GHSA-h638-c7p9-c97g
2026-11-05 Priority changed: MEDIUM → LOW

References

Exploit 1

https://github.com/Zimo-666/E5600-cves/tree/main/05-fqc-info-disclosure

Other 1

https://www.linksys.com/

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See all 253 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences