Data Exfiltration
We've curated 9 cybersecurity statistics about Data exfiltration to help you understand how unauthorized data transfers are becoming a critical risk for organizations in 2025, highlighting techniques used by cybercriminals and the defensive measures being implemented.
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96% of all disclosed ransomware cases involved data exfiltration in Q3 2025.
Ransomware group Radiant claimed to have exfiltrated data on over 8,000 children across Kido International's UK sites.
Ransomware group Radiant published profiles of ten children following a ransomware attack on Kido International.
Ransomware group Radiant threatened to release full profiles of 30 children following a ransomware attack on Kido International.
Ransomware group Radiant threatened to release data for 100 employees following a ransomware attack on Kido International.
Across 449 dark web victim listings where details were available, the average data volume exfiltrated was 527.65GB in Q3 2025.
The INC ransomware group exfiltrated 5.7 TB of data from the Pennsylvania Office of Attorney General.
Data exfiltration attempts were only stopped 3% of the time in 2025. This is down from 9% in 2024, representing a 3x decrease.
Attackers can exfiltrate sensitive data in as little as 6 seconds in API attacks.