A command injection vulnerability exists in Trane XL824, XL850, XL1050, and Pivot thermostats allowing an attacker to execute arbitrary commands as root using a specially crafted filename. The vulnerability requires physical access to the device via a USB stick.
https://www.trane.com/commercial/north-america/us/en/contact-us/locate-sales-offices.html
https://www.cisa.gov/news-events/ics-advisories/icsa-23-234-02