CVE-2026-4227
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Remote Buffer Overflow in LB-LINK BL-WR9000 get_hidessid_cfg

Publication date: 2026-03-16

Last updated on: 2026-03-20

Assigner: VulDB

Description
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 remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Meta Information
Published
2026-03-16
Last Modified
2026-03-20
Generated
2026-06-16
AI Q&A
2026-03-16
EPSS Evaluated
2026-06-15
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
lb-link bl-wr9000_firmware 2.4.9
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in the LB-LINK BL-WR9000 device, specifically in the function sub_44D844 within the file /goform/get_hidessid_cfg. It is a buffer overflow vulnerability that can be triggered remotely by an attacker.

A buffer overflow occurs when more data is written to a buffer than it can hold, which can lead to unexpected behavior, crashes, or execution of malicious code.

The vulnerability has been publicly disclosed and the vendor did not respond to the notification.

Impact Analysis

This vulnerability can have serious impacts because it allows remote attackers to exploit a buffer overflow in the device.

Successful exploitation could lead to unauthorized code execution, potentially allowing attackers to take control of the device, disrupt its operation, or access sensitive information.

Given the high CVSS scores (up to 9.0 in version 2.0), the impact includes confidentiality, integrity, and availability compromises.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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