# CVE-2026-121933: Linksys E5350 Setup Wizard apply.cgi save_settings missing authentication

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

A flaw has been found in Linksys E5350 1.0.00.037. This impacts the function save_settings of the file /wizard/apply.cgi of the component Setup Wizard. Executing a manipulation of the argument wizard_router_pwd can lead to missing authentication. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linksys / E5350: 1.0.00.037 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 10 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P; source: CNA: VulDB

- CVSS 3.1: 10 (critical); 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; source: CNA: VulDB

- CVSS 3.0: 10 (critical); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 10 (critical); AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-306, CWE-287

## Exploit evidence

- exploit: https://github.com/Zimo-666/E5350-cves/tree/main/02-empty-admin-password-auth-bypass (CNA: VulDB)

## References

- https://vuldb.com/vuln/431045 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/431045/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-121933 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1024276 (CNA: VulDB; third-party-advisory)

- https://github.com/Zimo-666/E5350-cves/tree/main/02-empty-admin-password-auth-bypass (CNA: VulDB; exploit)

- https://www.linksys.com/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-121933; retrieved 2026-11-04; source updated 2026-11-04

Revision: e40d73dc0138a5a3b556cea83a635a86e72cb8aa0c41f4f29186ace8ae20a1c8

Canonical: https://y2.dev/cve/CVE-2026-121933

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