CVE-2026-78578
Unauthenticated do Method Onboarding Connect Allows Wi‑Fi Reconfiguration Denial of Service Vulnerability in TP-Link Tapo C120 & C200
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 1, 2026
- Updated
- Oct 1, 2026
- Reserved
- Aug 24, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | 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 | TPLink |
Weaknesses
- CWE-306 Missing authentication for critical function
Affected Products
| Product | Versions |
|---|---|
Tapo C200 v5TP-Link Systems Inc. |
|
Tapo C120 v1TP-Link Systems Inc. |
|
References
- https://www.tp-link.com/us/support/download/tapo-c200/v5/#Firmware-Release-Notespatch
- https://www.tp-link.com/en/support/download/tapo-c200/v5/#Firmware-Release-Notespatch
- https://www.tp-link.com/us/support/download/tapo-c120/v1.26/#Firmware-Release-Notespatch
- https://www.tp-link.com/en/support/download/tapo-c120/v1.26/#Firmware-Release-Notespatch
- https://www.tp-link.com/us/support/faq/5321/vendor-advisory
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