CVE-2026-4976
Remote Buffer Overflow in Totolink LR350 WiFiGuestCfg Function
Publication date: 2026-03-27
Last updated on: 2026-04-03
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| totolink | lr350_firmware | 9.3.5u.6369_b20220309 |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.