CVE-2026-4228 LB-LINK BL-WR9000 set_wifi sub_458754 command injection

Medium 5.3 Published 16 Mar 2026 Updated 16 Mar 2026

Remote attackers can execute arbitrary commands on LB-LINK BL-WR9000 routers via the set_wifi interface, posing a critical security risk.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-4228?

CVE-2026-4228 is a medium-severity command injection vulnerability in LB-LINK BL-WR9000, published on 16 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was detected in LB-LINK BL-WR9000 2.4.9. This affects the function sub_458754 of the file /goform/set_wifi. The manipulation results in command injection. It is possible to launch the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-4228?

It affects 1 product.

Products include Lb-Link Bl-Wr9000 Firmware.

How do I fix CVE-2026-4228?

No fix has been published for CVE-2026-4228 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-4228 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4228 exists.

Sources

Also known as GHSA-hxpm-2ppg-5m8m.