Vulnerability · Published Jun 5, 2026 · Assigned by TPLink
CVE-2026-34123Whitelist Validation Bypass in TP-Link Tapo C520WS
High 7.0
In plain English
A high-severity improper authentication in Tapo C520WS v2 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | Tapo C520WS v2 | 0 – before 1.2.6 Build 260528 |
Weakness: CWE-287 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N