CVE-2026-27850

High · 7.5

CVSS

7.5

EPSS

0.4%

Published

Feb 25, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem	Package	Introduced	Fixed