CVE-2026-7748
Buffer Overflow in Totolink N300RH Firmware
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 router, specifically in the setUpgradeFW function of the /cgi-bin/cstecgi.cgi file, which handles POST requests.
An attacker can manipulate the FileName argument in this function to cause a buffer overflow.
This buffer overflow can be exploited remotely, and the exploit code has already been made publicly available.
How can this vulnerability impact me? :
Exploiting this vulnerability can lead to a buffer overflow, which may allow an attacker to execute arbitrary code on the affected device.
Since the attack can be launched remotely, it poses a significant risk of unauthorized access or control over the router.
This can result in disruption of network services, interception or manipulation of network traffic, or further compromise of connected systems.