CVE-2026-27850
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductMR9600
PublishedFeb 25, 2026
First seenFeb 25, 2026
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linksys MR9600 | 1.0.4.205530 | — |
| Linksys MX4200 | 1.0.13.210200 | — |
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