CVE-2026-24112
Buffer Overflow in Tenda W20E addWewifiWhiteUser Function
Publication date: 2026-03-02
Last updated on: 2026-03-03
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | w20e_firmware | 15.11.0.6 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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How can this vulnerability be detected on my network or system? Can you suggest some commands?
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What immediate steps should I take to mitigate this vulnerability?
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Can you explain this vulnerability to me?
This vulnerability exists in the Tenda W20E router firmware version 4.0br_V15.11.0.6. It occurs when an attacker specifies a crafted value for the parameter `userInfo` that is passed into the function `addWewifiWhiteUser`. Inside this function, the `sscanf` function processes `userInfo` without validating the size of the input, which can lead to a buffer overflow.
A buffer overflow happens when more data is written to a buffer than it can hold, potentially allowing attackers to overwrite adjacent memory, which can lead to unexpected behavior or exploitation.
How can this vulnerability impact me? :
The buffer overflow vulnerability in the Tenda W20E router could allow attackers to execute arbitrary code, cause the device to crash, or disrupt normal operation. This could lead to unauthorized access, denial of service, or compromise of the device's security.