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    CVE-2026-6239

    A stack‑based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF CreateUsers service, where the device fails to properly validate the number of XML user nodes during request processing. An authenticated attacker can send a specially crafted ONVIF request containing an excessive number of user entries to trigger memory corruption. Successful exploitation may cause the ONVIF management service to terminate unexpectedly, resulting in a denial‑of‑service (DoS) condition that disrupts device configuration and management functions.

    Published:Jun 5, 2026
    Last Modified:Jun 8, 2026
    EPS:Jun 5, 2026
    EPSS Score:0.00014
    CVSS Score:6.8

    Affected Products

    Vendor
    Tp-link
    Product
    Tapo C520ws V2

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-121 Stack-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-6242 (CVSS 6.8) — An authenticated format string vulnerability exists in the ONVIF Subscribe service in Tapo C520WS v2 due to im…
    CVE-2026-6241 (CVSS 6.8) — An authenticated format string vulnerability is present in the ONVIF AddScopes in Tapo C520WS v2, where user-c…
    CVE-2026-6240 (CVSS 6.8) — A stack-based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF DeleteUsers service, due to …
    CVE-2026-34123 (CVSS 7) — On Tapo C520WS v2, restricted accounts (for example, hub users) are intended to execute only a limited set of …
    CVE-2026-8714 (CVSS 7.1) — A denial-of-service vulnerability exists in the RTSP server component of TP-Link Tapo C520WS v2 due to imprope…
    CVE-2026-34124 (CVSS 7.1) — A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path pars…
    CVE-2026-34122 (CVSS 7.1) — A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration …
    CVE-2026-34121 (CVSS 8.7) — An authentication bypass vulnerability within the HTTP handling of the DS configuration service in TP-Link Tap…
    CVE-2026-34120 (CVSS 7.1) — A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous …
    CVE-2026-34119 (CVSS 7.1) — A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP parsing …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High