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    CVE-2026-27850

    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.

    Published:Feb 25, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 25, 2026
    EPSS Score:0.00044
    CVSS Score:7.5

    Affected Products

    Vendor
    Linksys
    Product
    Mr9600
    Vendor
    Linksys
    Product
    Mx4200

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

    Related CVEs

    CVE-2026-6992 (CVSS 7.3) — A vulnerability was identified in Linksys MR9600 2.0.6.206937. This affects the function BTRequestGetSmartConn…
    CVE-2026-4558 (CVSS 7.4) — A flaw has been found in Linksys MR9600 2.0.6.206937. Affected is the function smartConnectConfigure of the fi…
    CVE-2026-27849 (CVSS 9.8) — Due to missing neutralization of special elements, OS commands can be injected via the update functionality of…
    CVE-2026-27848 (CVSS 9.8) — Due to missing neutralization of special elements, OS commands can be injected via the handshake of a TLS-SRP …
    CVE-2026-27847 (CVSS 9.8) — Due to improper neutralization of special elements, SQL statements can be injected via the handshake of a TLS-…
    CVE-2026-27846 (CVSS 6.2) — Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for…
    CVE-2026-25603 (CVSS 6.6) — Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Linksys MR9600…
    CVE-2022-24372 (CVSS 4.6) — Linksys MR9600 devices before 2.0.5 allow attackers to read arbitrary files via a symbolic link to the root di…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High