CVE-2026-124058
Deferred Deferred - Pending Action

Buffer Overflow in TOTOLINK CA300-PoE Firmware

Vulnerability report for CVE-2026-124058, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-11-07

Last updated on: 2026-11-07

Assigner: VulDB

Description

A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. Affected is the function setWiFiRepeaterConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ApCliKeyStr can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

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Meta Information

Published
2026-11-07
Last Modified
2026-11-07
Generated
2026-11-07
AI Q&A
2026-11-07
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink ca300-poe 6.2c.884

Helpful Resources

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.

Attack-Flow Graph

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Executive Summary

This vulnerability is a buffer overflow in TOTOLINK CA300-PoE 6.2c.884. It exists in the setWiFiRepeaterConfig function of the file /cgi-bin/cstecgi.cgi. An attacker can manipulate the ApCliKeyStr argument to trigger a buffer overflow, which could lead to remote code execution or system crashes.

Impact Analysis

The vulnerability allows remote attackers to execute arbitrary code or crash the device. Since the exploit is public, unpatched systems are at high risk of compromise, leading to potential data theft, unauthorized access, or denial of service.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations using affected devices may face compliance violations, fines, or legal consequences if exploited.

Mitigation Strategies

Immediately update the TOTOLINK CA300-PoE firmware to the latest version to address the buffer overflow vulnerability in the setWiFiRepeaterConfig function. Disable remote access to the device's web interface if not required. Monitor network traffic for unusual activity targeting the /cgi-bin/cstecgi.cgi endpoint.

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