PatchTheCVECVE-2018-11315: The Local HTTP API in Radio Thermostat CT50 and CT80 1.04.84 and below products allows unauthorized access via
CVE-2018-11315 is a medium-severity flaw (CVSS 6.5) affecting ct50 firmware, ct80 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.8% (top 44%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2018-05-20 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-11315?
ct50 firmware: upgrade to newer than 1.04.84; ct80 firmware: upgrade to newer than 1.04.84. Exact commands for each OS are on this page.
Is CVE-2018-11315 being exploited?
CVE-2018-11315 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-11315 affect?
CVE-2018-11315 affects ct50 firmware, ct80 firmware. Severity is medium (CVSS 6.5). 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 acce
How urgent is CVE-2018-11315?
Priority 42/100. Public exploit reference