##### 12M  Meaning of cyber security incident -   A cyber security incident is one or more acts, events or circumstances involving any of the following: - \(a\) unauthorised access to: - \(i\) computer data; or - \(ii\) a computer program; - \(b\) unauthorised modification of: - \(i\) computer data; or - \(ii\) a computer program; - \(c\) unauthorised impairment of electronic communication to or from a computer; - \(d\) unauthorised impairment of the availability, reliability, security or operation of: - \(i\) a computer; or - \(ii\) computer data; or - \(iii\) a computer program\. --- ## Source and attribution Saved copy: C2018A00029 / C2026C00213 / f578e546a17068939a3a5a928474713f844dfae8 Scope: navPoint\_36 Compiled 2026\-06\-04\. This does not establish legal commencement\. Official source: https://www\.legislation\.gov\.au/C2018A00029/2026\-06\-04/2026\-06\-04/text/1/epub/OEBPS/document\_1/document\_1\.html Licence: https://creativecommons\.org/licenses/by/4\.0/ Based on content from the Federal Register of Legislation at 1 October 2026\. For the latest information on Australian Government legislation please go to https://www\.legislation\.gov\.au\. Converted XHTML into Tiptap JSON; recovered lists from paragraph classes; kept literal labels and text\. Print layout is changed\. The Commonwealth Coat of Arms is not covered by the CC BY licence\.