CVE-2026-27846Missing authentication in Linksys MR9600, Linksys MX4200

Description

Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for adding a new mesh device to the network  to gain access to sensitive information, including the password for admin access to the web interface and the Wi-Fi passwords.This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-002.txt third-party-advisorytechnical-description