Is CVE-2018-6402 actively exploited?

No active exploitation of CVE-2018-6402 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-6402 be exploited remotely?

Partially. CVE-2018-6402 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2018-6402?

CVE-2018-6402 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2018-6402

CWE-327Published: April 14, 2020· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

Ecobee Ecobee4 4.2.0.171 devices can be forced to deauthenticate and connect to an unencrypted Wi-Fi network with the same SSID, even if the device settings specify use of encryption such as WPA2, as long as the competing network has a stronger signal. An attacker must be able to set up a nearby SSID, similar to an "Evil Twin" attack.

NVD Source

Technical Analysis

CVE-2018-6402 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.5.