CVE-2026-34123
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
On the Tapo C520WS v2, due to a logic flaw in the API authorization mechanism, an attacker can bypass restrictions on restricted accounts. This allows unauthorized operations that should be blocked to be executed.
Risk Assessment
Successful exploitation of this vulnerability may lead to device resets, unintended configuration changes, or disruption of normal operation, resulting in loss of availability and integrity of the device.
Recommendation
It is recommended to update the device firmware to the latest version to patch this vulnerability and to review and restrict permissions for accounts with limited access.
Original NVD description (English source)
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.