TP-Link Tapo C120/Tapo C200 Onboarding Scan missing authentication

Summaryinfo

A vulnerability identified as problematic has been detected in TP-Link Tapo C120 and Tapo C200. This issue affects the function Scan of the component Onboarding Scan. The manipulation leads to missing authentication. This vulnerability is uniquely identified as CVE-2026-78577. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in TP-Link Tapo C120 and Tapo C200 (affected version not known). It has been rated as problematic. This issue affects the function Scan of the component Onboarding Scan. The manipulation with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is confidentiality. The summary by CVE is:

Tapo C120 v1 and C200 V5 contain a vulnerability in the HTTPS onboarding scan function due to missing authentication. After initial setup, an unauthenticated attacker on the same local network can invoke the scan action and retrieve nearby wireless access-point metadata, including SSIDs, BSSIDs, authentication and encryption modes, and signal-strength information. Successful exploitation may disclose information about the wireless environment surrounding the camera, allowing an attacker to learn elements of the local wireless topology.

The advisory is shared at tp-link.com. The identification of this vulnerability is CVE-2026-78577 since 08/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/01/2026).

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 C120
• Tapo C200

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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