CVE-2018-11315: Radiothermostat CT50 Firmware

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

The Local HTTP API in Radio Thermostat CT50 and CT80 1.04.84 and below products allows unauthorized access via a DNS rebinding attack. This can result in remote device temperature control, as demonstrated by a tstat t_heat request that accesses a device purchased in the Spring of 2018, and sets a home's target temperature to 95 degrees Fahrenheit. This vulnerability might be described as an addendum to CVE-2013-4860.

Affected products

• Radiothermostat CT50 Firmware: up to and including 1.04.84
• Radiothermostat CT80 Firmware: up to and including 1.04.84

Published 2018-05-20. Last modified 2026-06-17.