An issue was discovered in Roche Accu-Chek Inform II Instrument before 03.06.00 (Serial number below 14000) and 04.x before 04.03.00 (Serial Number above 14000), CoaguChek Pro II before 04.03.00, and cobas h 232 before 04.00.04 (Serial number above KQ0400000 or KS0400000). Improper access control allows attackers in the adjacent network to change the instrument configuration.