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CVE-2026-27850— Improper verification in Linksys MR9600, Linksys MX4200

Quick assessment

Affected
Linksys MR9600
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linksys MR9600和Linksys MX4200都是美国Linksys公司的产品。Linksys MR9600是一款无线路由器。Linksys MX4200是一个网状网络路由器。 Linksys MR9600 1.0.4.205530版本和Linksys MX4200 1.0.13.210200版本存在安全漏洞，该漏洞源于防火墙规则配置不当，可能导致未经授权的网络访问。

AI Predicted 7.5 Difficulty: Trivial EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-27850

Vulnerability Information
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Vulnerability Title
Improper verification in Linksys MR9600, Linksys MX4200
Source: CVE Program / CVE List V5
Vulnerability Description
Due to an improperly configured firewall rule, the router will accept any connection on the WAN port with the source port 5222, exposing all services which are normally only accessible through the local network. This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linksys MR9600和Linksys MX4200 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linksys MR9600和Linksys MX4200都是美国Linksys公司的产品。Linksys MR9600是一款无线路由器。Linksys MX4200是一个网状网络路由器。 Linksys MR9600 1.0.4.205530版本和Linksys MX4200 1.0.13.210200版本存在安全漏洞，该漏洞源于防火墙规则配置不当，可能导致未经授权的网络访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linksys MR9600 1.0.4.205530 -
Linksys MX4200 1.0.13.210200 -

II. Public POCs for CVE-2026-27850

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III. Intelligence Information for CVE-2026-27850

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Same Patch Batch · Linksys · 2026-02-25 · 5 CVEs total

CVE-2026-27847 Missing authentication in Linksys MR9600, Linksys MX4200
CVE-2026-27846 Missing authentication in Linksys MR9600, Linksys MX4200
CVE-2026-27848 Missing neutralization in Linksys MR9600, Linksys MX4200
CVE-2026-27849 Missing neutralization in Linksys MR9600, Linksys MX4200

IV. Related Vulnerabilities

Same product: MR9600
Same vendor: Linksys

V. Comments for CVE-2026-27850

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