CVE-2026-90605
Received Received - Intake

Buffer Overflow in Totolink A3002MU Router

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulDB

Description
A weakness has been identified in Totolink A3002MU Hh-B20211125.1046. This vulnerability affects the function formFilter of the file /boafrm/formFilter of the component boa. Executing a manipulation of the argument ip6addr can lead to buffer overflow. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks.

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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
CVE-2026-90605
EUVD
EUVD-2026-77140

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.

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Executive Summary

CVE-2026-90605 is a buffer overflow vulnerability in the TOTOlink A3002MU router firmware version Hh-B20211125.1046. It exists in the /bin/boa web server's formFilter interface due to improper input validation of the ip6addr parameter. A remote attacker can send a crafted HTTP POST request with an excessively long ip6addr value to the /boafrm/formFilter endpoint, causing memory corruption and crashing the Boa web server process.

Detection Guidance

To detect this vulnerability, monitor network traffic for HTTP POST requests to the /boafrm/formFilter endpoint with unusually long ip6addr parameter values. Check if the Boa web server process crashes or becomes unresponsive after such requests. Use packet capture tools like tcpdump or Wireshark to inspect traffic to port 80 or 443 for malformed requests targeting this endpoint.

Impact Analysis

This vulnerability can lead to a denial-of-service condition, making the router's management interface unresponsive. Attackers could exploit it to crash the device remotely, potentially disrupting network services. Since the exploit is publicly available, the risk of real-world attacks is significant.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by enabling remote denial-of-service attacks on network infrastructure. Buffer overflow flaws may lead to unauthorized access or disruption of critical systems, which could violate data protection requirements under these regulations.

Mitigation Strategies

Immediately update the router firmware to the latest version provided by Totolink. If no patch is available, disable remote access to the router's web interface or block external HTTP traffic to the /boafrm/formFilter endpoint using firewall rules. Monitor the device for crashes or unusual activity.

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