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.
This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Linksys | MR9600 | affected |
|
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| Linksys | MX4200 | unaffected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
No workaround given by the vendor.
References
History
Wed, 25 Feb 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Improper verification in Linksys MR9600, Linksys MX4200 | |
| References |
|
Projects
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MITRE
Status: PUBLISHED
Assigner: ENISA
Published:
Updated: 2026-02-25T16:58:06.450Z
Reserved: 2026-02-24T07:07:48.974Z
Link: CVE-2026-27850
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-02-25T18:23:41.350
Modified: 2026-02-25T18:23:41.350
Link: CVE-2026-27850
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.