CVE-2026-34123

Whitelist Validation Bypass in TP-Link Tapo C520WS

Published Jun 5, 2026 CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link tapo C520ws V2
Vendors & Products Tp-link
Tp-link tapo C520ws V2
Type Values Removed Values Added
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.
Title Whitelist Validation Bypass in TP-Link Tapo C520WS
Weaknesses CWE-287
References
Metrics cvssV4_0

{'score': 7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
TPLink
Published
Updated
Jun 8, 2026, 1:06 PM
Reserved
Mar 25, 2026, 6:54 PM
Status
Deferred
Published
Jun 6, 2026, 12:16 AM
Modified
Jul 23, 2026, 7:10 AM