CVE-2026-90608
Received Received - Intake

Buffer Overflow in Totolink A3002MU Router

Vulnerability report for CVE-2026-90608, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulDB

Description

A flaw has been found in Totolink A3002MU Hh-B20211125.1046. The affected element is the function formPortFw of the file /boafrm/formPortFw of the component boa. This manipulation of the argument service_type causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-14
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink a3002mu hH-B20211125.1046

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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-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.

Attack-Flow Graph

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Executive Summary

CVE-2026-90608 is a buffer overflow vulnerability in the TOTOlink A3002MU router affecting the /bin/boa web server's formPortFw interface. It occurs due to improper validation of the service_type parameter in HTTP requests. A remote attacker can send a crafted request with an excessively long value, causing memory overwrite, leading to a denial-of-service or potentially arbitrary code execution.

Detection Guidance

To detect this vulnerability, monitor for crashes in the Boa web server process or unresponsive management interfaces. Check for unusual HTTP POST requests to /boafrm/formPortFw with excessively long service_type parameters. Use network scanning tools to identify TOTOlink A3002MU devices running firmware Hh-B20211125.1046.

Impact Analysis

This vulnerability allows remote attackers to crash the router's web service, making the management interface unresponsive. It could also lead to denial-of-service or, in some cases, arbitrary code execution, potentially giving attackers control over the device.

Mitigation Strategies

Immediately update the router firmware to a patched version. If no patch is available, disable remote access to the management interface or restrict access to trusted IPs. Monitor network traffic for suspicious POST requests to /boafrm/formPortFw and block such requests at the firewall level.

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