---
id: CVE-2026-78578
title: "Tapo C120 v1 and C200 v5\ndo not enforce authentication for do method HTTPS onboarding connect actions\nafter initial setup.\_ An unauthenticated adjacent\nattacker can submit unauthorized wireless configuration parameters, causing the\ncamer…"
summary: "Tapo C120 v1 and C200 v5\ndo not enforce authentication for do method HTTPS onboarding connect actions\nafter initial setup.\_ An unauthenticated adjacent\nattacker can submit unauthorized wireless configuration parameters, causing the\ncamer…"
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-306
vendor: TP-Link Systems Inc.
product: Tapo C200 v5
affected:
  - tapo_c200_v5 < V5_1.4.6 Build 260709 Rel.27675n
  - tapo_c120_v1 < V1_1.9.4 Build 260813 Rel.79754n
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T20:36:38.330'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78578'
references:
  - url: >-
      https://www.tp-link.com/en/support/download/tapo-c120/v1.26/#Firmware-Release-Notes
    label: f23511db-6c3e-4e32-a477-6aa17d310630
  - url: >-
      https://www.tp-link.com/en/support/download/tapo-c200/v5/#Firmware-Release-Notes
    label: f23511db-6c3e-4e32-a477-6aa17d310630
  - url: >-
      https://www.tp-link.com/us/support/download/tapo-c120/v1.26/#Firmware-Release-Notes
    label: f23511db-6c3e-4e32-a477-6aa17d310630
  - url: >-
      https://www.tp-link.com/us/support/download/tapo-c200/v5/#Firmware-Release-Notes
    label: f23511db-6c3e-4e32-a477-6aa17d310630
  - url: 'https://www.tp-link.com/us/support/faq/5321/'
    label: f23511db-6c3e-4e32-a477-6aa17d310630
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-01T18:08:21.543786Z'
cvssSource: cna
ingestedAt: '2026-10-01T18:55:42.378Z'
---

## Overview

Tapo C120 v1 and C200 v5
do not enforce authentication for do method HTTPS onboarding connect actions
after initial setup.  An unauthenticated adjacent
attacker can submit unauthorized wireless configuration parameters, causing the
camera to attempt connection to a different network.





Successful
exploitation disconnects the camera from its intended wireless network, making
it unreachable on its management address, resulting in a denial-of-service
condition.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.