There is a critical firmware update for a security issue with Logitech Unifying receivers.
https://lifehacker.com/update-your-l...now-1836382167
https://www.theverge.com/2019/7/14/2...le-hack-hijack
https://support.logi.com/hc/en-us/co...earch-Findings
For Logitech’s Unifying receiver:
Mac: https://aws13-customer-care-assets.s.../SecureDFU.zip
PC: https://aws13-customer-care-assets.s...cureDFU_48.exe
For Logitech’s G900 gaming mouse:
http://www.logitech.com/pub/techsupp...ate_1.5.23.exe