Of course a Bluetooth-using home COVID test was cracked to fake resultswww.theregister.comThe Ellume COVID-19 Home Test was connected to the internet of woefully insecure things for a while

By changing only the byte value representing the "status of the test" in both STATUS and MEASUREMENT_CONTROL_DATA traffic, followed by calculating new CRC and checksum values, it was possible to alter the COVID test result before the Ellume app processes the data.

It gets worse: faked data produced by Ellume unit was happily ingested by an outfit named Azova that certifies the results of COVID tests so that travelers can enter the USA. F-Secure’s post details a test in which one of its staff used the Ellume device to test for COVID, produced a negative result, but used the methods above to falsify the results.