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

Published Nov 4, 2026

A flaw has been found in Linksys E5350 1.0.00.037. This impacts the function savesettings of the file /wizard/apply.cgi of the component Setup Wizard. Executing a manipulation of the argument wizardrouterpwd 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.

Frequently Asked Questions

Who is exposed to this issue?

Linksys E5350 devices running version 1.0.00.037 are identified as affected. Because the vulnerable Setup Wizard endpoint can be reached remotely, exposed devices may be reachable by an attacker over the network.

What does an attacker need to exploit it?

The published exploit targets the wizard_router_pwd argument handled by save_settings in /wizard/apply.cgi. The vector is network-based and requires neither prior privileges nor user interaction.

Is there a vendor-provided fix or workaround?

The available information does not identify a vendor fix or workaround. The vendor was contacted before disclosure but did not respond.

How serious is successful exploitation?

The issue is rated critical with a 9.3 score. Its vector indicates high impacts to confidentiality, integrity, and availability, with scope changed.

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

Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to exploit it?

Is there a vendor-provided fix or workaround?

How serious is successful exploitation?

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Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to exploit it?

Is there a vendor-provided fix or workaround?

How serious is successful exploitation?