CVE-2026-121618
Linksys E5600 Factory Quality Control fqc.cgi information disclosure
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| E5600 Linksys |
1.1.0.26 (affected) | CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
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 | CNA: VulDB |
| 3.1 / 5.3 medium |
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 | CNA: VulDB |
| 3.0 / 5.3 medium |
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 | CNA: VulDB |
| 2.0 / 5.0 medium |
AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:C | CNA: VulDB |
| 4.0 / 5.5 medium |
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 5.3 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | NVD: [email protected] |
| 2.0 / 5.0 medium |
AV:N/AC:L/Au:N/C:P/I:N/A:N | NVD: [email protected] |
Exploit evidence
- https://github.com/Zimo-666/E5600-cves/tree/main/05-fqc-info-disclosure
exploit · CNA: VulDB
References
- https://vuldb.com/vuln/430466CNA: VulDB · vdb-entry
- https://vuldb.com/vuln/430466/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-121618CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1023314CNA: VulDB · third-party-advisory
- https://github.com/Zimo-666/E5600-cves/tree/main/05-fqc-info-disclosureCNA: VulDB · exploit
- https://www.linksys.com/CNA: VulDB · product
- https://github.com/Zimo-666/E5600-cves/tree/main/05-fqc-info-disclosure[email protected]
- https://vuldb.com/cve/CVE-2026-121618[email protected]
- https://vuldb.com/submit/1023314[email protected]
- https://vuldb.com/vuln/430466[email protected]
- https://vuldb.com/vuln/430466/cti[email protected]
- https://www.linksys.com/[email protected]
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