Home / Monthly reports / November 2025
Outages & Breaches: November 2025 in numbers
1 significant outage (1 critical) and 8 data breaches (3 critical) were logged in November 2025. The largest breach by records was Coupang (33.7M). The longest outage with a known duration was Cloudflare (5.8 hours). The most common outage cause was configuration change (1 of 1).
Outages1▼ 3 vs October
Critical outages1wide impact
Downtime tracked6 hacross 1 outage with a known duration
Breaches8▲ 1 vs October
Critical breaches3sensitive data at scale
Records exposed36.7Mconfirmed or company-reported
Further claimed1.2Mattacker claims, unverified
Outage causes
Named attackers
Most significant incidents
- 30 Nov 2025Coupang breach exposes 33.7 million customersCoupang · breach · Suspected insider · 33.7M records
- 21 Nov 2025Gainsight apps abused to reach 200+ Salesforce customersGainsight / Salesforce · breach · ShinyHunters
- 18 Nov 2025Cloudflare bot-management file knocks out a large slice of the webCloudflare · outage · Configuration change · 5.8 hours
- 4 Nov 2025Swedish IT supplier breach exposes 1.5 millionMiljödata · breach · Datacarry · 1.5M records
- 28 Nov 2025Asahi ransomware may have exposed 1.5 million customersAsahi · breach · Qilin · 1.5M records
- 17 Nov 2025Logitech confirms data theft via third-party zero-dayLogitech · breach · Clop
- 13 Nov 2025Washington Post staff data stolen via Oracle EBS zero-dayThe Washington Post · breach · Clop · 9.7K records
- 13 Nov 2025DoorDash customers' and dashers' data stolenDoorDash · breach · Unknown
All 1 outage
- 18 Nov 2025Cloudflare bot-management file knocks out a large slice of the webCloudflare · outage · Configuration change · 5.8 hours
All 8 data breaches
- 30 Nov 2025Coupang breach exposes 33.7 million customersCoupang · breach · Suspected insider · 33.7M records
- 28 Nov 2025Asahi ransomware may have exposed 1.5 million customersAsahi · breach · Qilin · 1.5M records
- 21 Nov 2025Gainsight apps abused to reach 200+ Salesforce customersGainsight / Salesforce · breach · ShinyHunters
- 17 Nov 2025Logitech confirms data theft via third-party zero-dayLogitech · breach · Clop
- 13 Nov 2025Washington Post staff data stolen via Oracle EBS zero-dayThe Washington Post · breach · Clop · 9.7K records
- 13 Nov 2025DoorDash customers' and dashers' data stolenDoorDash · breach · Unknown
- 4 Nov 2025Swedish IT supplier breach exposes 1.5 millionMiljödata · breach · Datacarry · 1.5M records
- 1 Nov 2025Penn hacker claims data on 1.2 million donors and alumniUniversity of Pennsylvania · breach · Unknown · 1.2M claimed
2025 year to date
Incidents YTD127January to November 2025
Outages YTD48significant outages
Breaches YTD79data breaches
Critical YTD40outages and breaches
Records exposed YTD165Mconfirmed 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 |
| Nov | 1 | 8 | 4 | 127 |
| Total | 48 | 79 | 40 | 127 |
Cite this
Nuffield Consulting, “Outages & Breaches: November 2025 in numbers”, The Daily Tech Wire,published November 2025. https://techwire.nuffieldconsulting.com/reports/2025-11/ (retrieved 15 Nov 2026).
The underlying data for every month is in the CSV download.