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CVE-2026-34123

Whitelist Validation Bypass in TP-Link Tapo C520WS

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerTP-Link Systems Inc.
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Produkt Tapo C520WS v2
Default Statusunaffected
Version 0
Version < 1.2.6 Build 260528
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.046
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
f23511db-6c3e-4e32-a477-6aa17d310630 7 0 0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes
https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes
https://www.tp-link.com/us/support/faq/5120/