CVE-2026-34123: CWE-287 Improper Authentication in TP-Link Systems Inc. Tapo C520WS v2
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.
AI Analysis
Technical Summary
CVE-2026-34123 is an improper authentication vulnerability (CWE-287) in TP-Link Tapo C520WS v2. The device's API authorization logic incorrectly allows restricted accounts, such as hub users, to craft requests that exploit legitimate method mapping behavior to bypass whitelist restrictions. This flaw enables execution of sensitive operations that should be disallowed for restricted accounts, potentially causing device resets, unintended configuration changes, or operational disruption.
Potential Impact
Successful exploitation requires access to a restricted account and can result in unauthorized execution of sensitive operations. The impact includes potential loss of device availability and integrity through resets, configuration tampering, or disruption of normal functions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented. Users should monitor vendor communications for updates and consider restricting access to trusted users only.
CVE-2026-34123: CWE-287 Improper Authentication in TP-Link Systems Inc. Tapo C520WS v2
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.
CVSS v4.0
Score 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34123 is an improper authentication vulnerability (CWE-287) in TP-Link Tapo C520WS v2. The device's API authorization logic incorrectly allows restricted accounts, such as hub users, to craft requests that exploit legitimate method mapping behavior to bypass whitelist restrictions. This flaw enables execution of sensitive operations that should be disallowed for restricted accounts, potentially causing device resets, unintended configuration changes, or operational disruption.
Potential Impact
Successful exploitation requires access to a restricted account and can result in unauthorized execution of sensitive operations. The impact includes potential loss of device availability and integrity through resets, configuration tampering, or disruption of normal functions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented. Users should monitor vendor communications for updates and consider restricting access to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-03-25T18:54:03.343Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a23675be29bf47b50dbe8ce
Added to database: 06/06/2026, 00:18:35 UTC
Last enriched: 06/13/2026, 09:52:45 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 88
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