CVE-2026-4558: Linksys MR9600 Firmware

High severity, CVSS 8.8. EPSS: 7.8% chance of exploitation in the next 30 days.

A flaw has been found in Linksys MR9600 2.0.6.206937. 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 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.

Affected products

• Linksys MR9600 Firmware: version 2.0.6.206937 only

Published 2026-03-22. Last modified 2026-06-17.