CVE-2026-7749
Buffer Overflow in Totolink N300RH Firmware via DNS Configuration
Publication date: 2026-05-04
Last updated on: 2026-05-04
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| totolink | n300rh | 3.2.4-b20220812 |
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 N300RH device, specifically in version 3.2.4-B20220812. It affects the function setWanConfig within the file /cgi-bin/cstecgi.cgi, which handles POST requests. The issue arises from improper handling of the argument priDns, leading to a buffer overflow. This means that an attacker can remotely send crafted data to overflow the buffer, potentially causing unexpected behavior or allowing further exploitation.
How can this vulnerability impact me? :
The buffer overflow vulnerability can be exploited remotely without user interaction, which may allow an attacker to execute arbitrary code or cause a denial of service on the affected device. This can lead to compromise of the device's functionality, unauthorized access, or disruption of network services.