CVE-2026-27850
Improper verification in Linksys MR9600, Linksys MX4200
- State
- Published
- Severity
- 7.5 High
- Published
- Feb 25, 2026
- Updated
- Feb 25, 2026
- Reserved
- Feb 24, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
MR9600Linksys |
|
MX4200Linksys |
|
References
- https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-014.txtthird-party-advisorytechnical-description
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