For the 2020-21 fiscal year, the Australian Cyber Security Centre (ACSC) responded to 1,630 cases, which would be 31 incidents a week. Compared to the previous financial year, the total number of cybersecurity incidents decreased by 28%.
ACSC does not have to respond to any incidents in the top third of its six incident grading categories. In the year prior, it reported a single category 1 incident and four category 2 incidents.
In total, ACSC observed that the higher category grade is the most reported, with category 4 replacing category 5. Category 4 accounts for 49% whereas last year it accounted for 35% of all incidents.