CVE-2026-34122
Received Received - Intake
Stack-Based Buffer Overflow in TP-Link Tapo C520WS Causes DoS

Publication date: 2026-04-02

Last updated on: 2026-04-06

Assigner: TPLink

Description
A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.
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Meta Information
Published
2026-04-02
Last Modified
2026-04-06
Generated
2026-06-16
AI Q&A
2026-04-02
EPSS Evaluated
2026-06-15
NVD
CVE-2026-34122
EUVD
EUVD-2026-18434
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
tp-link tapo_c520ws_firmware to 1.2.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

This vulnerability is a stack-based buffer overflow found in the TP-Link Tapo C520WS version 2.6. It occurs in a configuration handling component due to insufficient input validation. An attacker can exploit it by providing an excessively long value for a vulnerable configuration parameter, which causes a stack overflow.

Impact Analysis

Exploiting this vulnerability can lead to a Denial-of-Service (DoS) condition. This means the affected device may crash or reboot unexpectedly, resulting in loss of availability of the device or its services.

Compliance Impact

The vulnerability causes a Denial-of-Service (DoS) condition by crashing or rebooting the device, which impacts availability.

Since availability is a key component of many compliance standards such as GDPR and HIPAA, this vulnerability could negatively affect compliance by disrupting service availability.

However, there is no specific information provided about direct impacts on data confidentiality or integrity, or explicit references to compliance requirements.

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