CVE-2026-105285
Received Received - Intake

Stack-Based Buffer Overflow in Totolink A3002MU

Vulnerability report for CVE-2026-105285, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: VulDB

Description

A security vulnerability has been detected in Totolink A3002MU 1.0.0-B20230403.1455. This affects an unknown function of the file /boafrm/formIpQoS of the component QoS Rule Handler. The manipulation of the argument addQos/comment/entry_name leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink a3002mu 1.0.0-b20230403.1455

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-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

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Executive Summary

CVE-2026-105285 is a stack-based buffer overflow in Totolink A3002MU router firmware version 1.0.0-B20230403.1455. The flaw exists in the /boafrm/formIpQoS handler where the comment and entry_name parameters are copied into a small 188-byte stack buffer without proper length checks. Attackers can send a POST request with oversized values to trigger the overflow, overwriting the return address and enabling arbitrary code execution with root privileges.

Detection Guidance

Check for POST requests to /boafrm/formIpQoS with large comment or entry_name parameters. Use network monitoring tools like tcpdump or Wireshark to inspect traffic for suspicious payloads targeting this endpoint. Verify if the router's management interface crashes or becomes unresponsive after sending malformed QoS rule requests.

Commands: curl -X POST http://<router-ip>/boafrm/formIpQoS -d "addQos=1&comment=<4096-chars>&entry_name=<4096-chars>" to test for crashes. Monitor system logs for segmentation faults or watchdog restarts.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary code on the router with root privileges without authentication. It can cause denial of service by crashing the management interface until a watchdog restart. The attack is possible over the network and requires no user interaction.

Mitigation Strategies

Isolate the affected router from untrusted networks. Disable remote administration if possible. Apply firmware updates from Totolink if available. Block external access to /boafrm/formIpQoS via firewall rules. Monitor for unusual traffic patterns or crashes.

As a temporary workaround, restrict input lengths for comment and entry_name parameters to 188 bytes or less. Replace vulnerable strcpy calls with snprintf in firmware if you have access to the source code.

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