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CVE-2026-4226— LB-LINK BL-WR9000 get_virtual_cfg sub_44E8D0 stack-based overflow

Quick assessment

Affected
LB-LINK BL-WR9000
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LB-LINK BL-WR9000是中国必联（LB-LINK）公司的一款无线路由器。 LB-LINK BL-WR9000 2.4.9版本存在安全漏洞，该漏洞源于对文件/goform/get_virtual_cfg中函数sub_44E8D0的操作，可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 1.15% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4226

Vulnerability Information
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Vulnerability Title
LB-LINK BL-WR9000 get_virtual_cfg sub_44E8D0 stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in LB-LINK BL-WR9000 2.4.9. The affected element is the function sub_44E8D0 of the file /goform/get_virtual_cfg. Executing a manipulation can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
LB-LINK BL-WR9000 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LB-LINK BL-WR9000是中国必联（LB-LINK）公司的一款无线路由器。 LB-LINK BL-WR9000 2.4.9版本存在安全漏洞，该漏洞源于对文件/goform/get_virtual_cfg中函数sub_44E8D0的操作，可能导致栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LB-LINK BL-WR9000 2.4.9 -

II. Public POCs for CVE-2026-4226

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III. Intelligence Information for CVE-2026-4226

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Vendor Advisories for CVE-2026-4226 (1)

Security Blog Posts for CVE-2026-4226 (1)

Same Patch Batch · LB-LINK · 2026-03-16 · 3 CVEs total

CVE-2026-4227 8.8 HIGH LB-LINK BL-WR9000 get_hidessid_cfg sub_44D844 buffer overflow
CVE-2026-4228 6.3 MEDIUM LB-LINK BL-WR9000 set_wifi sub_458754 command injection

IV. Related Vulnerabilities

Same product: BL-WR9000
Same vendor: LB-LINK
Same weakness: CWE-121

V. Comments for CVE-2026-4226

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