Live disclosure tracker · updated continuously

2026 Data Breaches Year-to-Date

2026 continues the year-over-year growth trend in confirmed disclosures. The list below updates as new breaches are reported by Verizon DBIR partners and major security news outlets.

98B+
Records Exposed
644
Incidents
94+
Countries
+104%
Breach Velocity YoY
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2026 Data Breaches Year-to-Date (644 indexed)

high · education · Apr 17, 2026

Teen arrested in Northern Ireland

Alexander Martin reports: A 16-year-old boy has been arrested in Northern Ireland after a cyberattack disrupted access to educational systems used by potentially hundreds of thousands of students. The boy, who has not be

View incident → Original disclosure Indexed 2 weeks, 1 day ago
medium · healthcare · Apr 17, 2026

Flawed Cisco update threatens to

Cisco admins are scrambling to patch a critical flash memory overflow vulnerability in over 200 Cisco Systems IOS XE-based models of wireless access points (APs), caused by a recent flawed software update. If the issu

View incident → Original disclosure Indexed 2 weeks, 1 day ago
medium · other · Apr 17, 2026

Recently

Threat actors are exploiting three recently disclosed Windows security vulnerabilities in attacks aimed at gaining SYSTEM or elevated administrator permissions. [...]

View incident → Original disclosure Indexed 2 weeks, 1 day ago
high · tech · Apr 16, 2026

Apache ActiveMQ

Apache ActiveMQ Improper Input Validation Vulnerability — Apache ActiveMQ contains an improper input validation vulnerability that allows for code injection.

View incident → Original disclosure Indexed 2 weeks, 2 days ago
medium · other · Apr 16, 2026

Sweden

Sweden says a pro-Russian group attacked a heating plant in 2025. The failed cyberattack highlights growing threats to Europe’s energy infrastructure. Sweden has blamed a pro-Russian group linked to Russian intelligence

View incident → Original disclosure Indexed 2 weeks, 2 days ago
critical · government · Apr 16, 2026

Double trouble

Kenna Hughes-Castleberry reports: Nine Mexican government agencies were hacked in an artificial intelligence (AI)-driven cyber campaign between December 2025 and mid-February 2026 in what researchers have said should &#8

View incident → Original disclosure Indexed 2 weeks, 2 days ago
medium · government · Apr 16, 2026

Defendant Sentenced To Prison For

Not everyone complies with the conditions of pre-sentencing release. After pleading guilty to a credential stuffing attack, this defendant reopened his online criminal shop and advertised what he was doing. Unsurprisingl

View incident → Original disclosure Indexed 2 weeks, 2 days ago
critical · other · Apr 15, 2026

Educational company McGraw Hill

The data breach emerged this weekend when the ShinyHunters cybercriminal organization claimed to have stolen 45 million Salesforce records and threatened to leak the information by April 14 if a ransom was not paid.

View incident → Original disclosure Indexed 2 weeks, 3 days ago
medium · other · Apr 15, 2026

100 Chrome Extensions Steal User

Published through five accounts, the extensions appear part of a coordinated campaign based on shared C&C infrastructure. The post 100 Chrome Extensions Steal User Data, Create Backdoor appeared first on SecurityWee

View incident → Original disclosure Indexed 2 weeks, 3 days ago
critical · finance · Apr 15, 2026

The deepfake dilemma

Deepfake technology has crossed a critical threshold. What was impossible 10 years ago and required specific expertise only a few years ago is now cheap and accessible. Worse, it’s now good enough to fool a wide range of

View incident → Original disclosure Indexed 2 weeks, 3 days ago