What is CVE-2026-4227?

CVE-2026-4227 is a high-severity vulnerability in Lb-link Bl-wr9000, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-03-16.

How severe is CVE-2026-4227?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Lb-link Bl-wr9000

CVE-2026-4227

A security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9. The impacted element is the function sub_44D844 of the file /goform/get_hidessid_cfg. The manipulation leads to buffer overflow. It is possible to initiate the attack r…

Vulnerability class: Buffer Overflow

EPSS: 0.007 (48.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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-2026-4227?: CVE-2026-4227 is a high-severity vulnerability in Lb-link Bl-wr9000, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-03-16.
How severe is CVE-2026-4227?: High severity. CVSS v3 base score is 8.8 out of 10.