---
title: "Information security event — EASA Definition · Avioverse"
description: "Article 3, Regulations (EU) 2023/203 and 2022/1645: ‘information security event’ means an identified occurrence of a system, service or network state…"
url: "https://avioverse.aero/glossary/easa/information-security-event"
---

# information security event

EASA defines “information security event” in one regulation. The wording below is reproduced verbatim from the EASA Easy Access Rules, with a link to the paragraph it comes from.

> ‘information security event’ means an identified occurrence of a system, service or network state indicating a possible breach of the information security policy or failure of information security controls, or a previously unknown situation that can be relevant for information security;

Article 3 · Information Security (Part-IS) · Regulations (EU) 2023/203 and 2022/1645 · Easy Access Rules, 5 Dec 2025 revision · [Read Article 3](https://avioverse.aero/regulations/easa/part-is/implementing-regulation-eu-2023-203/cover-regulation-to-implementing-regulation-eu#article-3)

## Defined in the same article

- [incident](https://avioverse.aero/glossary/easa/incident)
- [information security](https://avioverse.aero/glossary/easa/information-security)
- [information security risk](https://avioverse.aero/glossary/easa/information-security-risk)
- [Threat](https://avioverse.aero/glossary/easa/threat)
- [vulnerability](https://avioverse.aero/glossary/easa/vulnerability)