Vulnerability · Published Oct 1, 2026 · Assigned by TPLink

CVE-2026-78578Unauthenticated do Method Onboarding Connect Allows Wi‑Fi Reconfiguration Denial of Service Vulnerability in TP-Link Tapo C120 & C200

High 7.1

In plain English

A high-severity missing authentication in Tapo C120 v1 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.3%top 80.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
TP-Link Systems Inc.	Tapo C200 v5	0 – before V5_1.4.6 Build 260709 Rel.27675n
TP-Link Systems Inc.	Tapo C120 v1	0 – before V1_1.9.4 Build 260813 Rel.79754n

Weakness: CWE-306 · Vector: 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

In plain English

Official description

Affected products (as reported)

References