CVE-2018-25396: Heatmiser Wifi Thermostat

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Heatmiser Wifi Thermostat 1.7 contains a credential disclosure vulnerability that allows unauthenticated attackers to retrieve administrative credentials by accessing the networkSetup.htm page. Attackers can request the networkSetup.htm endpoint and extract plaintext username and password values from HTML form fields to gain administrative access to the thermostat.

Affected products

• Heatmiser Heatmiser Wifi Thermostat: version 1.7 only

Published 2026-05-29. Last modified 2026-07-21.