CVE-2026-34123
Deferred Deferred - Pending Action
Authorization Bypass in Tapo C520WS v2 via API Logic Flaw

Publication date: 2026-06-06

Last updated on: 2026-06-08

Assigner: TPLink

Description
On Tapo C520WS v2, restricted accounts (for example, hub users) are intended to execute only a limited set of low‑sensitivity operations. Due to a logic flaw in the device’s API authorization mechanism, an attacker can craft requests that leverage legitimate “method mapping” behavior to bypass whitelist restrictions, allowing restricted operations to be masked as permitted requests and executed. Successful exploitation may allow an attacker (with access to a restricted account) to execute unauthorized sensitive operations.  Depending on the operation invoked, impact could include device resets, unintended configuration changes, or disruption of normal operation, leading to loss of availability and integrity of the device.
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Meta Information
Published
2026-06-06
Last Modified
2026-06-08
Generated
2026-06-27
AI Q&A
2026-06-06
EPSS Evaluated
2026-06-25
NVD
CVE-2026-34123
EUVD
EUVD-2026-34933
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
tp-link tapo_c520ws 1.2.6
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
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Executive Summary

CVE-2026-34123 is a whitelist validation bypass vulnerability in the TP-Link Tapo C520WS v2 camera system. The issue arises from a logic flaw in the device's API authorization mechanism.

Restricted accounts, such as hub users, are intended to perform only a limited set of low-sensitivity operations. However, due to this flaw, an attacker with access to such a restricted account can craft requests that exploit legitimate "method mapping" behavior to bypass whitelist restrictions.

This allows the attacker to mask restricted operations as permitted requests and execute unauthorized sensitive operations on the device.

Impact Analysis

Successful exploitation of this vulnerability may allow an attacker to execute unauthorized sensitive operations on the device.

  • Device resets without authorization.
  • Unintended configuration changes.
  • Disruption of normal device operation.

These impacts can lead to loss of availability and integrity of the device.

Mitigation Strategies

To mitigate the CVE-2026-34123 vulnerability on the TP-Link Tapo C520WS v2 camera system, it is recommended to update the device firmware to version 1.2.6 Build 260528 or later.

Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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