CVE-2026-24110
Received Received - Intake
Buffer Overflow in Tenda W20E DHCP 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. Attackers may send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule, " %d\t%[^\t]\t%[^\n\r\t]", &dhcpsIndex, dhcpsIP, dhcpsMac);`, the lack of size validation for the rules could lead to buffer overflows in `dhcpsIndex`, `dhcpsIP`, and `dhcpsMac`.
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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-2026-24110
EUVD
EUVD-2026-9197
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 V4.0br_V15.11.0.6 device. Attackers can send overly long data to the addDhcpRules function. When this data is processed by the addDhcpRule function using the sscanf function, there is no validation on the size of the input. This lack of size validation can cause buffer overflows in the variables dhcpsIndex, dhcpsIP, and dhcpsMac.

Impact Analysis

The buffer overflow caused by this vulnerability can potentially allow attackers to execute arbitrary code, crash the device, or cause denial of service. This can lead to unauthorized access or disruption of network services provided by the affected device.

Compliance Impact

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