CVE-2026-78578

High

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.

SeverityHigh

CVSS7.1

Exploit probability—

ProductTapo C200 v5

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

TP-Link Systems Inc. Tapo C200 v5V5_1.4.6 Build 260709 Rel.27675n or later
TP-Link Systems Inc. Tapo C120 v1V1_1.9.4 Build 260813 Rel.79754n or later

Patches

Vendor advisories

tp-link.com/us/support/faq/5321/

Affected products

Product	Affected versions	Fixed in
TP-Link Systems Inc. Tapo C200 v5	v < V5_1.4.6 Build 260709 Rel.27675n	V5_1.4.6 Build 260709 Rel.27675n
TP-Link Systems Inc. Tapo C120 v1	v < V1_1.9.4 Build 260813 Rel.79754n	V1_1.9.4 Build 260813 Rel.79754n

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