Home / Monthly reports / October 2025
Outages & Breaches: October 2025 in numbers
4 significant outages (2 critical) and 7 data breaches (5 critical) were logged in October 2025. The largest breach by records was Prosper (17.6M). The longest outage with a known duration was AWS us-east-1 (14.5 hours). The most common outage cause was configuration change (1 of 4).
Outages4▼ 2 vs September
Critical outages2wide impact
Downtime tracked25 hacross 3 outages with a known duration
Breaches7same as September
Critical breaches5sensitive data at scale
Records exposed20.8Mconfirmed or company-reported
Outage causes
Named attackers
Most significant incidents
- 29 Oct 2025Azure Front Door config change breaks Microsoft 365, Xbox and retailersAzure Front Door (global) · outage · Configuration change · 8.4 hours
- 20 Oct 2025AWS DynamoDB DNS failure takes down much of the internetAWS us-east-1 · outage · DNS · 14.5 hours
- 20 Oct 2025Prosper breach exposes 17.6 million usersProsper · breach · Unknown · 17.6M records
- 15 Oct 2025Nation-state hackers steal F5 BIG-IP source codeF5 · breach · Nation-state (China-linked, reported)
- 14 Oct 2025SimonMed says 1.2 million patients hit in January breachSimonMed Imaging · breach · Medusa · 1.2M records
- 7 Oct 2025Discord support vendor breach exposes ID photosDiscord · breach · Unknown · 70K records
- 1 Oct 2025WestJet breach exposes 1.2 million passengersWestJet · breach · Scattered Spider · 1.2M records
- 9 Oct 2025Azure Front Door edge sites crash across EMEAAzure Front Door (EMEA) · outage · Software bug
All 4 outages
- 29 Oct 2025Azure Front Door config change breaks Microsoft 365, Xbox and retailersAzure Front Door (global) · outage · Configuration change · 8.4 hours
- 20 Oct 2025AWS DynamoDB DNS failure takes down much of the internetAWS us-east-1 · outage · DNS · 14.5 hours
- 9 Oct 2025Azure Front Door edge sites crash across EMEAAzure Front Door (EMEA) · outage · Software bug
- 2 Oct 2025Commonwealth Bank app, website and ATMs fail togetherCommonwealth Bank · outage · Software / dependency · 2 hours
All 7 data breaches
- 20 Oct 2025Prosper breach exposes 17.6 million usersProsper · breach · Unknown · 17.6M records
- 15 Oct 2025Nation-state hackers steal F5 BIG-IP source codeF5 · breach · Nation-state (China-linked, reported)
- 14 Oct 2025SimonMed says 1.2 million patients hit in January breachSimonMed Imaging · breach · Medusa · 1.2M records
- 7 Oct 2025Discord support vendor breach exposes ID photosDiscord · breach · Unknown · 70K records
- 1 Oct 2025WestJet breach exposes 1.2 million passengersWestJet · breach · Scattered Spider · 1.2M records
- 1 Oct 2025Red Hat consulting GitLab breachedRed Hat Consulting · breach · Crimson Collective
- 1 Oct 2025Dealership software breach hits 766,000Motility Software · breach · Pear · 767K records
2025 year to date
Incidents YTD118January to October 2025
Outages YTD47significant outages
Breaches YTD71data breaches
Critical YTD36outages and breaches
Records exposed YTD129Mconfirmed or company-reported
| Month | Outages | Breaches | Critical | Running total |
|---|---|---|---|---|
| Jan | 5 | 9 | 0 | 14 |
| Feb | 6 | 6 | 2 | 26 |
| Mar | 5 | 5 | 1 | 36 |
| Apr | 9 | 9 | 3 | 54 |
| May | 2 | 7 | 3 | 63 |
| Jun | 4 | 7 | 4 | 74 |
| Jul | 4 | 7 | 3 | 85 |
| Aug | 2 | 7 | 6 | 94 |
| Sep | 6 | 7 | 7 | 107 |
| Oct | 4 | 7 | 7 | 118 |
| Total | 47 | 71 | 36 | 118 |
Cite this
Nuffield Consulting, “Outages & Breaches: October 2025 in numbers”, The Daily Tech Wire,published October 2025. https://techwire.nuffieldconsulting.com/reports/2025-10/ (retrieved 15 Nov 2026).
The underlying data for every month is in the CSV download.