Linksys MR9600/MX4200 Web Interface missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linksys MR9600 and MX4200 and classified as critical. Impacted is an unknown function of the component Web Interface. Such manipulation leads to missing authentication. This vulnerability is uniquely identified as CVE-2026-27846. The attack can be executed directly on the physical device. No exploit exists.

Detailsinfo

A vulnerability was found in Linksys MR9600 and MX4200 (the affected version is unknown) and classified as critical. Affected by this issue is an unknown code of the component Web Interface. The manipulation with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at syss.de. This vulnerability is handled as CVE-2026-27846 since 02/24/2026. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 6.2
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/24/2026 CVE reserved
02/25/2026 +1 days Advisory disclosed
02/25/2026 +0 days VulDB entry created
02/28/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: linksys.com

Advisory: SYSS-2025-002
Status: Not defined

CVE: CVE-2026-27846 (🔒)
GCVE (CVE): GCVE-0-2026-27846
GCVE (VulDB): GCVE-100-347792

Entryinfo

Created: 02/25/2026 17:35
Updated: 02/28/2026 20:54
Changes: 02/25/2026 17:35 (53), 02/28/2026 20:54 (11)
Complete: 🔍
Cache ID: 216::103

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