TP-Link Tapo C520WS 2.6 HTTP buffer overflow

Summaryinfo

A vulnerability was found in TP-Link Tapo C520WS 2.6 and classified as critical. Affected by this issue is some unknown functionality of the component HTTP Handler. The manipulation results in buffer overflow. This vulnerability is known as CVE-2026-34124. Access to the local network is required for this attack. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in TP-Link Tapo C520WS 2.6. Affected is an unknown code of the component HTTP Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces length restrictions on the raw request path but does not account for path expansion performed during normalization. An attacker on the adjacent network may send a crafted HTTP request to cause buffer overflow and memory corruption, leading to system interruption or device reboot.

The advisory is shared for download at tp-link.com. This vulnerability is traded as CVE-2026-34124 since 03/25/2026. The exploitability is told to be easy. The attack needs to be initiated within the local network. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/02/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• TP-Link

Name

• Tapo C520WS

Version

• 2.6

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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