Vulnerability Details CVE-2026-34121
An authentication bypass vulnerability within the HTTP handling of the DS configuration service in TP-Link Tapo C520WS v2.6 was identified, due to inconsistent parsing and authorization logic in JSON requests during authentication check. An unauthenticated attacker can append an authentication-exempt action to a request containing privileged DS do actions, bypassing authorization checks.
Successful exploitation allows unauthenticated execution of restricted configuration actions, which may result in unauthorized modification of device state.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 21.9%
CVSS Severity
CVSS v3 Score 8.8
References
Products affected by CVE-2026-34121
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cpe:2.3:h:tp-link:tapo_c520ws:2.6
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cpe:2.3:o:tp-link:tapo_c520ws_firmware:*