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

Quick assessment

Affected
LB-LINK BL-WR9000
Exploitation
High exploitation probability; assess promptly
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版本存在命令注入漏洞，该漏洞源于对文件/goform/set_wifi中函数sub_458754的操作导致命令注入，可能导致远程执行任意命令。

CVSS 6.3 · Medium EPSS 9.23% · P95

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4228

Vulnerability Information
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Vulnerability Title
LB-LINK BL-WR9000 set_wifi sub_458754 command injection
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
LB-LINK BL-WR9000 命令注入漏洞
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版本存在命令注入漏洞，该漏洞源于对文件/goform/set_wifi中函数sub_458754的操作导致命令注入，可能导致远程执行任意命令。
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-2026-4228

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III. Intelligence Information for CVE-2026-4228

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Vendor Advisories for CVE-2026-4228 (2)

Other References for CVE-2026-4228 (1)

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

CVE-2026-4226 8.8 HIGH LB-LINK BL-WR9000 get_virtual_cfg sub_44E8D0 stack-based overflow
CVE-2026-4227 8.8 HIGH LB-LINK BL-WR9000 get_hidessid_cfg sub_44D844 buffer overflow

IV. Related Vulnerabilities

Same product: BL-WR9000
Same vendor: LB-LINK
Same weakness: CWE-77

V. Comments for CVE-2026-4228

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