Auth bypass in Linksys Mr9600

CVE-2026-27846

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…

Vulnerability class: Broken Authentication

EPSS: 0.000 (6.2th percentile) — read the EPSS interpretation.

Affected products

Linksys Mr9600 — versions 1.0.4.205530
Linksys Mx4200 — versions 1.0.13.210200

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-002.txt (third-party-advisory, technical-description)