Command Injection Vulnerability in LB-LINK BL-WR9000 Router
CVE-2026-4228

5.3MEDIUM

Key Information:

Vendor

Lb-link

Status
Bl-wr9000
Vendor
CVE Published:
16 March 2026

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 12%

What is CVE-2026-4228?

A command injection vulnerability is present in the LB-LINK BL-WR9000 version 2.4.9, specifically within the function sub_458754 located in the /goform/set_wifi file. This critical flaw allows attackers to execute arbitrary commands on the device remotely, potentially compromising network security. The exploit is now publicly available, posing a significant risk to users. Despite early communication with the vendor regarding this issue, there has been no response to address the vulnerability.

Affected Version(s)

BL-WR9000 2.4.9

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-4228 - Proof of Concept

References

https://vuldb.com/?id.351151
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351151
signaturepermissions-required
https://vuldb.com/?submit.771210
third-party-advisory

EPSS Score

12% chance of being exploited in the next 30 days.

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

jfkk (VulDB User)
VulDB
.