A new attack method named COVID-bit uses electromagnetic waves to transmit data from air-gapped systems, which are isolated from the internet, over a distance of at least two meters (6.5 ft), where it's captured by a receiver.

The information emanating from the isolated device could be picked up by a nearby smartphone or laptop, even if a wall separates the two.
#InfoSec #DataTheft
https://www.bleepingcomputer.com/news/security/air-gapped-pcs-vulnerable-to-data-theft-via-power-supply-radiation/

@MrGoat
I was a bit surprised that one of the mitigation strategies was not adding EM / RF shielding to air-gapped systems.