Medium severity · published Feb 25, 2026
CVE-2026-27846
Missing authentication in Linksys MR9600, Linksys MX4200
6.2
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MR
MR9600 · Linksys
1.0.4.205530 · source: vendor
MX
MX4200 · Linksys
1.0.13.210200 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27846
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27846
www.syss.de
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-002.txt
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