CVE-2026-4558 | Linksys MR9600 2.0.6.206937 SmartConnect.lua smartConnectConfigure os command injection

A vulnerability was found in Linksys MR9600 2.0.6.206937 and classified as critical. Affected is the function smartConnectConfigure of the file SmartConnect.lua. Executing a manipulation of the argument configApSsid/configApPassphrase/srpLogin/srpPassword can lead to os command injection.

The identification of this vulnerability is CVE-2026-4558. The attack may be launched remotely. Furthermore, there is an exploit available.

The vendor was contacted early about this disclosure but did not respond in any way.