What is CVE-2026-4228?

CVE-2026-4228 is a medium-severity vulnerability in Lb-Link Bl-Wr9000, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-16.

How severe is CVE-2026-4228?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in Lb-Link Bl-Wr9000

CVE-2026-4228

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.

EPSS: 0.122 (95.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Lb-link Bl-wr9000 — versions 2.4.9
Lb-link Bl-wr9000_firmware — versions 2.4.9

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (Exploit, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2026-4228?: CVE-2026-4228 is a medium-severity vulnerability in Lb-Link Bl-Wr9000, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-16.
How severe is CVE-2026-4228?: Medium severity. CVSS v3 base score is 6.3 out of 10.