CVE-2026-7717
Received Received - Intake

Buffer Overflow in Totolink WA300 Firmware via File Upload

Publication date: 2026-05-04

Last updated on: 2026-05-04

Assigner: VulDB

Description
A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. This issue affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Executing a manipulation of the argument File can lead to buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.

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Meta Information

Published
2026-05-04
Last Modified
2026-05-04
Generated
2026-07-06
AI Q&A
2026-05-04
EPSS Evaluated
2026-07-05
NVD
CVE-2026-7717
EUVD
EUVD-2026-26868

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink wa300 5.2cu.7112_b20190227

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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.

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Executive Summary

This vulnerability exists in the Totolink WA300 device, specifically in the UploadCustomModule function within the /cgi-bin/cstecgi.cgi file's POST Request Handler component.

An attacker can manipulate the argument 'File' in a way that causes a buffer overflow, which is a condition where more data is written to a buffer than it can hold.

This buffer overflow can be exploited remotely, meaning an attacker does not need physical access to the device to launch the attack.

The exploit for this vulnerability has been publicly disclosed and may be used by attackers.

Impact Analysis

Exploiting this vulnerability can lead to a buffer overflow, which may allow an attacker to execute arbitrary code or cause the device to crash.

Since the attack can be launched remotely, it increases the risk of unauthorized access or control over the affected device.

The impact includes potential compromise of device integrity, confidentiality, and availability.

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