Home / Monthly reports / March 2025
Outages & Breaches: March 2025 in numbers
5 significant outages (1 critical) and 5 data breaches (0 critical) were logged in March 2025. The largest breach by records was Oracle Cloud (6M claimed). The longest outage with a known duration was Heathrow Airport (24 hours). The most common outage cause was cyberattack (4 of 5). 1 of the incidents mainly affected the UK.
Outages5▼ 1 vs February
Critical outages1wide impact
Downtime tracked24 hacross 1 outage with a known duration
Breaches5▼ 1 vs February
Critical breaches0sensitive data at scale
Records exposed535Kconfirmed or company-reported
Further claimed7Mattacker claims, unverified
Outage causes
Named attackers
Most significant incidents
- 21 Mar 2025Substation fire shuts Heathrow for a dayHeathrow Airport · outage · Power / fire · 24 hours
- 26 Mar 2025NYU website hacked to leak admissions dataNew York University · breach · Unknown · 1M claimed
- 23 Mar 2025Cyber attack forces Ukrainian railway ticketing offlineUkrzaliznytsia · outage · Cyberattack
- 23 Mar 2025Cyber attack disrupts Kuala Lumpur airportKuala Lumpur International Airport · outage · Cyberattack
- 21 Mar 2025Hacker claims 6 million Oracle Cloud SSO recordsOracle Cloud · breach · rose87168 · 6M claimed
- 19 Mar 2025PSEA breach exposes 500,000Pennsylvania State Education Association · breach · Rhysida · 517K records
- 18 Mar 2025GitHub Actions supply chain attack leaks secretsGitHub Actions (tj-actions) · breach · Unknown
- 10 Mar 2025X knocked offline repeatedly by DDoS attacksX · outage · Cyberattack
All 5 outages
- 23 Mar 2025Cyber attack forces Ukrainian railway ticketing offlineUkrzaliznytsia · outage · Cyberattack
- 23 Mar 2025Cyber attack disrupts Kuala Lumpur airportKuala Lumpur International Airport · outage · Cyberattack
- 21 Mar 2025Substation fire shuts Heathrow for a dayHeathrow Airport · outage · Power / fire · 24 hours
- 10 Mar 2025X knocked offline repeatedly by DDoS attacksX · outage · Cyberattack
- 3 Mar 2025Ransomware-style attack disrupts Maryland countyAnne Arundel County · outage · Cyberattack
All 5 data breaches
- 26 Mar 2025NYU website hacked to leak admissions dataNew York University · breach · Unknown · 1M claimed
- 21 Mar 2025Hacker claims 6 million Oracle Cloud SSO recordsOracle Cloud · breach · rose87168 · 6M claimed
- 19 Mar 2025PSEA breach exposes 500,000Pennsylvania State Education Association · breach · Rhysida · 517K records
- 18 Mar 2025GitHub Actions supply chain attack leaks secretsGitHub Actions (tj-actions) · breach · Unknown
- 6 Mar 2025NTT Communications breach exposes 18,000 business customersNTT Communications · breach · Unknown · 17.9K records
2025 year to date
Incidents YTD36January to March 2025
Outages YTD16significant outages
Breaches YTD20data breaches
Critical YTD3outages and breaches
Records exposed YTD20.4Mconfirmed or company-reported
| Month | Outages | Breaches | Critical | Running total |
|---|---|---|---|---|
| Jan | 5 | 9 | 0 | 14 |
| Feb | 6 | 6 | 2 | 26 |
| Mar | 5 | 5 | 1 | 36 |
| Total | 16 | 20 | 3 | 36 |
Cite this
Nuffield Consulting, “Outages & Breaches: March 2025 in numbers”, The Daily Tech Wire,published March 2025. https://techwire.nuffieldconsulting.com/reports/2025-03/ (retrieved 15 Nov 2026).
The underlying data for every month is in the CSV download.