CVE-2026-34121: high-severity vulnerability in TP-Link Systems Inc. Tapo C520WS v2.6
Authentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of TP-Link Tapo C520WS and C210
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.5%
An authentication bypass vulnerability within the HTTP handling of the DS configuration service in TP-Link Tapo C520WS v2.6 and C210 v3 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.
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Related CVEs — TP-Link Systems Inc. Tapo C520WS v2.6
In the same product, most dangerous first.
CVE-2025-8065HIGHRemote Code Execution via Stack-based Buffer Overflow in ONVIF SOAP Parser in TP-Link Tapo C200 and C520WSEPSS 0.5%CVE-2026-34118HIGHHeap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in multiple TP-Link Tapo CamerasEPSS 0.4%CVE-2026-34124HIGHDenial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WSEPSS 0.3%CVE-2026-34122HIGHStack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WSEPSS 0.3%CVE-2026-34120HIGHHeap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WSEPSS 0.2%CVE-2026-34119HIGHHeap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WSEPSS 0.2%