CVE-2026-4976
Received Received - Intake
Remote Buffer Overflow in Totolink LR350 WiFiGuestCfg Function

Publication date: 2026-03-27

Last updated on: 2026-04-03

Assigner: VulDB

Description
A vulnerability was found in Totolink LR350 9.3.5u.6369_B20220309. This vulnerability affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ssid results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used.
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Meta Information
Published
2026-03-27
Last Modified
2026-04-03
Generated
2026-06-16
AI Q&A
2026-03-28
EPSS Evaluated
2026-06-15
NVD
CVE-2026-4976
EUVD
EUVD-2026-16852
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
totolink lr350_firmware 9.3.5u.6369_b20220309
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.
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Executive Summary

This vulnerability exists in the Totolink LR350 router firmware version 9.3.5u.6369_B20220309, specifically in the function setWiFiGuestCfg within the file /cgi-bin/cstecgi.cgi.

The issue arises from improper handling of the argument 'ssid', which leads to a buffer overflow condition.

Because the vulnerability can be exploited remotely, an attacker can send specially crafted input to trigger the overflow without needing physical access.

The exploit for this vulnerability has been made public, increasing the risk of attacks.

Impact Analysis

Exploitation of this buffer overflow vulnerability can lead to severe impacts including unauthorized control over the affected device.

Potential consequences include compromise of confidentiality, integrity, and availability of the device and its network traffic.

Since the vulnerability can be exploited remotely without user interaction, attackers could execute arbitrary code or disrupt network services.

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