---
title: "Ireland HSE security incident"
description: "What the retained public evidence establishes about the Ireland HSE incident, its attack path, impact, and response."
incident_type: "Cybersecurity incident"
status: "active"
last_modified: "2026-09-19"
canonical_url: "https://www.ally.security/incidents/ireland-hse-security-incident-2021"
markdown_url: "https://www.ally.security/incidents/ireland-hse-security-incident-2021.md"
stix_url: "https://www.ally.security/incidents/ireland-hse-security-incident-2021/stix.json"
---

# Ireland HSE security incident

The retained public source describes the Ireland HSE incident as Conti; phishing email opened weeks prior. Other material details remain unresolved.

Last modified Sep 19, 2026 · 1 source

## Summary

- **Environment:** Government/Healthcare (national)
- **Operational impact:** The reviewed source does not establish a precise operational or data impact
- **Financial impact:** No financial figure is established by the reviewed source evidence

## What happened

In 2021, Ireland HSE experienced an incident in its government/healthcare (national) environment. The retained source describes the attack path as follows: Conti; phishing email opened weeks prior. [1](#source-1)

## Impact

- The reviewed source does not establish a precise affected-person count, data scope, or operational consequence.
- No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.

## Threat Group & Attack Vector

The retained source describes the attack path as follows: Conti; phishing email opened weeks prior. The canonical record does not add intrusion steps beyond those supported by the source. [1](#source-1)

### Actors

- **Conti** — identified in the supported attack description. [1](#source-1)

### TTPs

- [T1566 — Phishing](https://attack.mitre.org/techniques/T1566/) — mapped from the cited behavior. [1](#source-1)

## Response

The reviewed source does not describe containment, notification, or restoration steps in enough detail to summarize them responsibly.

This account is bounded to [Conti cyber attack on the HSE – Independent post incident review](https://about.hse.ie/publications/conti-cyber-attack-on-the-hse-independent-post-incident-review/). Details absent from that evidence are left unresolved rather than inferred. [1](#source-1)

## Assets

[Download the case-scoped STIX 2.1 bundle](<https://www.ally.security/incidents/ireland-hse-security-incident-2021/stix.json>)

## Sources

Primary source records used to research this incident.

<a id="source-1"></a>

### Conti cyber attack on the HSE – Independent post incident review

official · Health Service Executive

<https://about.hse.ie/publications/conti-cyber-attack-on-the-hse-independent-post-incident-review/>

<details>
<summary>Evidence ledger</summary>

Review the supporting structured claims.

1. **Used Attack Technique · 90% confidence · current**  
   Ireland HSE security incident: https://attack.mitre.org/techniques/T1566/
2. **Resulted In · 100% confidence · current**  
   Ireland HSE security incident: The reviewed source documents the ireland hse security incident involving Ireland HSE.
3. **Resulted In · 83% confidence · current**  
   Ireland HSE security incident: Conti; phishing email opened weeks prior.
4. **Affected Organization · 100% confidence · current**  
   Ireland HSE security incident: Ireland HSE

</details>