What is CVE-2026-4227?

CVE-2026-4227 is a high-severity vulnerability in Lb-link Bl-wr9000, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). 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: 0.002 (36.6th 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/E:P/RL:X/RC:R.

Affected products

Lb-link Bl-wr9000 — versions 2.4.9

Weakness classification (CWE)

References

VDB-351150 | LB-LINK BL-WR9000 get_hidessid_cfg sub_44D844 buffer overflow (vdb-entry, technical-description)
VDB-351150 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #771209 | LB-LINK BL-WR9000 V2.4.9 Buffer Overflow (third-party-advisory)
github.com/glkfc/IoT-Vulnerability/blob/main/LB-LINK/LB-LINK_HideSSID stack ove… (exploit)

Frequently asked questions

What is CVE-2026-4227?: CVE-2026-4227 is a high-severity vulnerability in Lb-link Bl-wr9000, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). 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.