CVE-2026-24115
Received Received - Intake
Buffer Overflow in Tenda W20E QoS Rule Processing

Publication date: 2026-03-02

Last updated on: 2026-03-03

Assigner: MITRE

Description
An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate the sizes of `gstup` and `gstdwn` before concatenating them into `gstruleQos` may lead to buffer overflow.
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Meta Information
Published
2026-03-02
Last Modified
2026-03-03
Generated
2026-06-16
AI Q&A
2026-03-02
EPSS Evaluated
2026-06-15
NVD
CVE-2026-24115
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
tenda w20e_firmware 15.11.0.6
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Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability exists in the Tenda W20E device running version 4.0br_V15.11.0.6. It occurs because the software does not properly check the sizes of two variables, `gstup` and `gstdwn`, before combining them into another variable called `gstruleQos`. This improper validation can cause a buffer overflow, which means more data is written to a buffer than it can hold.

Impact Analysis

The buffer overflow caused by this vulnerability can potentially allow an attacker to execute arbitrary code, crash the device, or cause it to behave unpredictably. This can lead to denial of service or unauthorized control over the affected device.

Compliance Impact

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